Perspective Depth Projection Design

batch: Batch 19

aliases:
Spatial Depth Representation Design
Perspective Construction
Projected Depth Composition
Viewpoint-Based Space Construction
Pictorial Perspective System Design

slug: perspective

slug: projection

slug: comparison

slug: scale

slug: composition

slug: iconicity

slug: invariance

components:
Representation Purpose and Audience
Spatial Subject and Reference Model
Coordinate, Scale, and Unit Frame
Observer or Station Point
Picture Plane and View Frame
Horizon and Eye Level
Projection Family Specification
Vanishing and Direction Structure
Measuring and Scale-Recession Rule
Foreshortening and Orientation Model
Occlusion and Depth-Order Map
Perceptual Depth-Cue Hierarchy
Projection Distortion Budget
Anchor and Constraint Set
Viewpoint-Induced Omission Record
Perspective Validation Plan

mechanisms:
Perspective Grid Construction
Vanishing-Point Convergence Layout
Measuring-Point Interval Transfer
Orthographic or Axonometric View Set
Curvilinear Field Mapping
Occlusion and Silhouette Check
Scale and Foreshortening Overlay
Atmospheric Depth-Cue Pass
Alternate-View and Section Validation
Viewpoint-Omission Audit

essence_one_line: Fix the observer and projection relation, construct depth through convergence, scale, foreshortening, overlap, and atmosphere, and disclose where the chosen viewpoint distorts or hides spatial truth.

compression_statement: Perspective Depth Projection Design maps a spatial subject to a bounded image, drawing, model view, or visual field by declaring the representation purpose, observer or camera, projection surface, view volume, horizon and eye level, projection family, convergence and measuring rules, scale recession, foreshortening, occlusion order, depth-cue hierarchy, and error tolerance. It validates constructed geometry against anchor points and alternate views, separates deliberate expression from accidental inconsistency, and records blind regions, cultural conventions, accessibility limits, and reconstruction boundaries so apparent depth is legible without being mistaken for a neutral or complete view.

core_intuition: Depth is not carried intact onto a flat surface. A representation selects a station point, projection law, frame, scale, and cue system. Parallel lines may converge, equal objects may shrink with distance, surfaces may foreshorten, and one object may hide another. Those effects can create a convincing spatial field, but every projection also privileges a view and loses information. A mature perspective system therefore constructs depth and audits its omissions at the same time.

canonical_formula: image_point = project(world_point, station_point_or_view_direction, projection_surface, projection_family); preserve declared incidence, ordering, scale, and depth-cue invariants; validate anchors and alternate views; disclose distortion, occlusion, and uncertainty outside the intended viewing and reconstruction boundary.

structural_problem: A spatial subject or imagined environment must be communicated through a surface or bounded view that lacks physical depth. Without an explicit viewpoint, projection rule, frame, scale, convergence structure, cue hierarchy, and validation method, objects float, recede inconsistently, intersect impossibly, change size without reason, or appear plausible while concealing critical relations. Conversely, rigid geometric construction can suppress embodied, cultural, expressive, or multi-view purposes and falsely present one viewpoint as complete.

trigger_conditions: A two-dimensional work must communicate location, distance, volume, enclosure, or recession.

trigger_conditions: Architecture or engineering intent must be checked from a viewer or camera position.

trigger_conditions: Multiple objects need consistent scale and occlusion across foreground, middle ground, and distance.

trigger_conditions: A visual narrative depends on height, distance, dominance, approach, or spatial reveal.

trigger_conditions: A technical view must permit measurement or reconstruction within a stated tolerance.

trigger_conditions: An image intentionally departs from linear perspective and needs a coherent alternate rule.

trigger_conditions: A fixed viewpoint risks hiding access, safety, power, or environmental consequences.

symptoms: Parallel edges converge toward incompatible vanishing structures without expressive intent.

symptoms: Figures or objects change size inconsistently at the same depth.

symptoms: Ellipses, shadows, stairs, grids, or repeated intervals contradict the declared eye level.

symptoms: Occlusion order implies impossible intersections or reverses front and back unintentionally.

symptoms: Cropping or viewpoint hides critical circulation, access, context, or downstream impact.

symptoms: Atmospheric cues contradict geometric depth and flatten or invert the scene.

symptoms: A diagram appears measurable although perspective distortion makes direct measurement invalid.

symptoms: One culturally familiar depth convention is treated as universal visual truth.

root_tension: A projection must reduce three-dimensional relations enough to become legible on a bounded surface, yet the reduction inevitably distorts metric properties, hides surfaces, and centers a viewer. Greater geometric consistency can improve reconstruction while narrowing expressive or embodied plurality; greater expressive freedom can preserve meaning while weakening spatial predictability.

anti_signatures: The task is to change analytical level rather than depict spatial depth; use scale_reframing.

anti_signatures: The work occupies and responds to an actual site through material, light, and public use; use site_responsive_spatial_abstraction, with this archetype only for its drawings or view studies.

anti_signatures: Meaning is completed primarily by a viewer moving through or manipulating a work; use viewer_participation_and_embodied_interpretation.

anti_signatures: The question is whose cultural, political, historical, or epistemic perspective is included; use perspective-taking, dual-frame, stakeholder, or omission-audit archetypes.

anti_signatures: The output is a map whose primary contract is topological, geographic, or geodetic accuracy; use the relevant mapping archetype and treat perspective view as a supplemental depiction.

intent: Construct a depth representation whose viewpoint, geometry, cue system, distortion, and omissions are appropriate to the intended experience, explanation, decision, or reconstruction.

action: Define the spatial subject, audience, medium, use, and consequence of misreading depth.

output: representation_purpose_and_spatial_subject

action: Establish coordinate, scale, and reference geometry for known or imagined space.

action: Choose station point or view direction, eye level, view target, field of view, and frame.

action: Select linear, orthographic, oblique, axonometric, curvilinear, reverse, compound, or hybrid projection.

action: Construct horizon, vanishing directions, measuring relations, picture plane, and clipping volume as applicable.

action: Place anchor forms and propagate scale recession, foreshortening, overlap, and repeated intervals.

action: Integrate atmospheric, tonal, color, texture, focus, shadow, and motion cues without contradicting geometry unintentionally.

action: Record intentional departures, inaccessible or hidden regions, uncertainty, and cultural convention boundaries.

action: Validate anchor points, intersections, silhouettes, depth ordering, scale, and alternate views or models.

action: Revise for legibility, accessibility, ethics, expressive purpose, and the declared accuracy tolerance.

range: linear_central | orthographic | oblique | axonometric | curvilinear | reverse | compound | hybrid

effect: Determines which spatial properties are preserved, distorted, or made directly measurable.

range: fixed_point | fixed_direction | moving_path | multiple_points | viewer_calibrated

effect: Controls horizon, convergence, visible surfaces, scale dominance, and omission.

effect: Trades spatial inclusion against edge distortion and attentional concentration.

range: expressive_low | perceptually_coherent | constructional | measurement_grade

effect: Sets allowable inconsistency and validation burden.

effect: Affects legibility, ambiguity, visual load, and resilience across audiences.

range: intimate | room | building | urban | landscape | planetary | imagined

effect: Changes cue reliability, atmospheric influence, precision, and practical construction method.

range: single | paired | sequential | simultaneous | interactive

effect: Trades unified construction against coverage, embodiment, and exposure of hidden relations.

range: implicit | annotated | comparative_views | reconstruction_metadata

effect: Controls whether users can recognize projection limits and recover spatial relations.

decision_rules: Use central linear perspective when a fixed-view optical impression and coherent convergence are primary.

decision_rules: Use orthographic or axonometric projection when parallelism, comparison, construction, or direct measurement matters more than optical recession.

decision_rules: Use curvilinear or compound projection when the field exceeds a stable linear view or multiple directions must remain visible.

decision_rules: Use reverse, divergent, or deliberately inconsistent systems only with an explicit expressive or cultural rationale.

decision_rules: Add alternate views, sections, plans, models, or interactive navigation when one view hides consequential information.

decision_rules: Refuse measurement claims from a perspective image unless calibration and reconstruction metadata support them.

target_outcomes: Spatial depth reads coherently for the intended audience and viewing condition.

target_outcomes: Objects maintain defensible position, scale, orientation, intersection, and occlusion relations.

target_outcomes: Projection choices support the intended aesthetic, technical, narrative, or decision purpose.

target_outcomes: Intentional distortions are legible as choices rather than accidental construction failures.

target_outcomes: Hidden, cropped, uncertain, or non-reconstructable relations are disclosed proportionately.

target_outcomes: Alternate views or accessible translations cover consequential omissions.

output: representation_purpose_and_spatial_subject

prose_essence:
Perspective Depth Projection Design constructs a legible representation of three-dimensional
space on a surface or bounded visual field. It begins by stating why depth must be communicated and
what a spatial misreading would cost. It then fixes a subject model, observer or camera, picture
plane or view surface, projection family, horizon and orientation references, convergence or
parallel-projector structure, scale and foreshortening rules, occlusion order, perceptual depth cues,
distortion tolerance, and validation method.

The archetype is not synonymous with one-point perspective. Linear central projection is one
variant. Orthographic and axonometric views, curvilinear panoramas, reverse perspective, compound
views, and hybrid moving-view systems can all be valid when their rules, intended use, and inference
boundaries are explicit. The invariant is disciplined translation: viewers should be able to
understand what spatial relations the representation preserves, what it transforms, and what the
chosen viewpoint cannot show.

The frozen catalog contains many uses of perspective in the sense of viewpoint, cultural frame,
analytical scale, observer relation, or embodied movement. It contains no accepted lifecycle for
constructing depicted depth. This draft fills that specific gap without absorbing social or
epistemic perspective-taking.

prose_when_to_use:
Use the archetype for drawing, painting, illustration, architectural visualization, urban design,
technical views, scientific imaging, photography, cinema, virtual environments, exhibition
graphics, or any bounded view where apparent depth affects understanding.

Do not use it merely because the word perspective means opinion or standpoint. Do not replace a
mapping contract when topology or geography is primary. Do not replace site-responsive or embodied
installation design when actual movement, material, ecology, and public use are the intervention.

Prerequisites are modest but explicit: a subject, an audience and purpose, a declared license for
measurement or invention, and an owner for projection and validation decisions.

prose_structural_problem:
A surface has height and width but no literal recession. To depict a room, landscape, body,
machine, street, or imagined world, a maker must encode distance and orientation indirectly.
Convergence, relative size, overlap, foreshortening, vertical placement, texture, focus, atmosphere,
light, and motion can all signal depth. If those signals are chosen independently, the result may
appear plausible locally while failing as a spatial system.

The structural problem has two parts. The first is constructive: map a spatial model through a
declared projection so objects share one coherent relation to the observer, frame, and scale. The
second is critical: recognize that every projection centers or parameterizes a viewpoint, distorts
some properties, and hides some surfaces. A technically perfect hero image can still be a poor
decision artifact if it conceals an accessibility barrier, shadow impact, service zone, crowding
condition, or affected community.

Perspective becomes especially fragile when reference material combines different focal lengths,
when a scene is invented piecemeal, when a wide field is forced into rectilinear geometry, or when
an expressive departure is applied without protecting anchors. The archetype makes those choices
inspectable and revisable.

prose_intervention_logic:
First define the representation purpose: optical experience, narrative staging, design review,
construction communication, comparison, measurement, orientation, or exploration. Identify the
audience, medium, viewing distance, image size, interaction, and consequence of error.

Build or declare a spatial reference model. This may be measured coordinates, plans and sections, a
3D model, a scene graph, a maquette, observed anchor dimensions, or an intentionally invented but
internally constrained space. Establish axes, units, scale, and orientation.

Choose the observer relation. A station point includes location, eye level, view direction, target,
and field of view. Parallel projection replaces a finite station point with a view direction.
Moving, plural, or interactive views need a path or set, not a fictitious single eye.

Select projection family. Central linear perspective supports optical recession from a fixed view;
orthographic and axonometric systems support comparison and construction; curvilinear projection
handles wide fields; reverse and plural systems support particular cultural or expressive goals;
hybrid systems couple modes across space, scale, or time.

Construct geometry and depth cues, then validate. Known points, repeated intervals, silhouettes,
intersections, and alternate views provide anchors. Finally record intentional distortion,
viewpoint-induced omission, accessibility translations, and the limit of measurement or
reconstruction.

### Decision Rules

Choose central linear perspective when a fixed optical viewpoint and convergence are essential.
Choose orthographic or axonometric views when comparison, fabrication, or direct scale relations
matter more than optical appearance. Choose curvilinear or compound projection when the field or
view plurality exceeds one stable rectilinear view.

Use deliberate inconsistency only when it serves a stated expressive, symbolic, narrative, or
cultural goal. Protect enough anchors for the viewer to distinguish intended departure from
accidental collapse.

Add alternate evidence whenever one view hides a consequential condition. Reject direct metric
inference from a perspective image unless the image is calibrated and the reconstruction procedure
is validated. When a depth cue is inaccessible to part of the audience, add a redundant cue or
alternate representation rather than assuming one visual pathway is universal.

prose_key_components:
### Representation Purpose and Audience (`representation_purpose_and_audience`)

A versioned statement of the spatial understanding, experience, comparison, decision, or reconstruction the representation must support, for whom, under what viewing conditions, and with what consequence if depth is misread.

Semantic canonical mapping retained the complete legacy component record: {"slug":"representation_purpose_and_audience","name":"Representation Purpose and Audience","component_type":"specification","maturity":"reusable","definition":"A versioned statement of the spatial understanding, experience, comparison, decision, or reconstruction the representation must support, for whom, under what viewing conditions, and with what consequence if depth is misread.","required_fields":["purpose","audience","medium","viewing_condition","required_spatial_inferences","prohibited_inferences","consequence_of_error","owner"],"invariants":["Accuracy and disclosure requirements follow the consequence, not visual style.","Intended audience and viewing condition remain explicit."],"validation_checks":["Every later projection choice traces to at least one use requirement.","Prohibited metric or completeness inferences are stated."],"failure_signatures":["photorealism_substitutes_for_purpose","audience_assumed_universal","no_error_consequence"],"domain_examples":["architectural_public_review","technical_illustration","narrative_painting","virtual_exhibit"]}

### Spatial Subject and Reference Model (`spatial_subject_and_reference_model`)

The bounded spatial inventory and relation model from which the view is constructed, including objects, surfaces, axes, adjacency, dimensions, uncertainty, and invented versus measured status.

Semantic canonical mapping retained the complete legacy component record: {"slug":"spatial_subject_and_reference_model","name":"Spatial Subject and Reference Model","component_type":"model","maturity":"reusable","definition":"The bounded spatial inventory and relation model from which the view is constructed, including objects, surfaces, axes, adjacency, dimensions, uncertainty, and invented versus measured status.","required_fields":["subject_boundary","objects_and_surfaces","spatial_relations","reference_sources","measured_or_invented_status","uncertainty","version"],"invariants":["Every rendered anchor maps to a reference identity or explicit invention.","Unknown geometry is not silently presented as measured."],"validation_checks":["Object identities and relations are internally consistent.","Reference-source conflicts are recorded."],"failure_signatures":["piecemeal_reference_conflict","missing_object_identity","invented_geometry_laundered_as_fact"],"domain_examples":["scene_graph","measured_building_model","observed_still_life_blockout","conceptual_environment"]}

### Coordinate, Scale, and Unit Frame (`coordinate_scale_and_unit_frame`)

A shared origin, axis orientation, handedness, unit, scale, transformation, and tolerance frame used to relate reference geometry, projection construction, and validation evidence.

Semantic canonical mapping retained the complete legacy component record: {"slug":"coordinate_scale_and_unit_frame","name":"Coordinate, Scale, and Unit Frame","component_type":"reference_frame","maturity":"reusable","definition":"A shared origin, axis orientation, handedness, unit, scale, transformation, and tolerance frame used to relate reference geometry, projection construction, and validation evidence.","required_fields":["origin","axes","handedness","unit","scale","transforms","tolerance","version"],"invariants":["Transformations are invertible within their declared loss boundary.","Units and axis meanings do not change silently."],"validation_checks":["unit_consistency_check","anchor_transform_check","scale_comparison_check"],"failure_signatures":["mixed_units","mirrored_axis","local_scale_drift","undocumented_transform"],"domain_examples":["architectural_coordinates","canvas_block_grid","camera_world_frame","axonometric_axes"]}

### Observer or Station Point (`observer_station_point`)

The eye, camera, view direction, or bounded set/path of viewpoints from which projection rays and visibility are defined.

Semantic canonical mapping retained the complete legacy component record: {"slug":"observer_station_point","name":"Observer or Station Point","component_type":"viewpoint_record","maturity":"reusable","definition":"The eye, camera, view direction, or bounded set/path of viewpoints from which projection rays and visibility are defined.","required_fields":["viewpoint_type","position_or_direction","eye_height","target","field_of_view","movement_or_plurality","viewing_distance","rationale"],"invariants":["A single-point claim uses one consistent station.","Moving or plural views are represented as such."],"validation_checks":["visible_surface_check","horizon_relation_check","field_of_view_check","alternate_view_comparison"],"failure_signatures":["camera_teleportation","incompatible_reference_views","hidden_station_point","unrepresentative_hero_view"],"domain_examples":["painter_eye_point","architectural_camera","parallel_view_direction","cinematic_camera_path"]}

### Picture Plane and View Frame (`picture_plane_and_view_frame`)

The projection surface and crop through which space is represented, including aspect ratio, clipping, placement relative to the viewer, and inclusion/exclusion effects.

Semantic canonical mapping retained the complete legacy component record: {"slug":"picture_plane_and_view_frame","name":"Picture Plane and View Frame","component_type":"boundary","maturity":"reusable","definition":"The projection surface and crop through which space is represented, including aspect ratio, clipping, placement relative to the viewer, and inclusion/exclusion effects.","required_fields":["surface_geometry","position_or_mapping","aspect_ratio","crop","clipping_volume","image_extent","safe_margin","excluded_context"],"invariants":["Frame and crop remain traceable to the released artifact.","Consequential exclusions appear in the omission record."],"validation_checks":["crop_review","edge_distortion_check","clipping_check","output_size_viewing_test"],"failure_signatures":["critical_object_clipped","misleading_crop","inconsistent_aspect","edge_overstretch"],"domain_examples":["canvas_rectangle","camera_sensor","panoramic_cylinder","viewport_window"]}

### Horizon and Eye Level (`horizon_and_eye_level`)

The orientation reference locating eye level and vanishing behavior for level directions or the analogous reference in non-linear projection.

Semantic canonical mapping retained the complete legacy component record: {"slug":"horizon_and_eye_level","name":"Horizon and Eye Level","component_type":"reference_relation","maturity":"reusable","definition":"The orientation reference locating eye level and vanishing behavior for level directions or the analogous reference in non-linear projection.","required_fields":["horizon_geometry","eye_level_basis","tilt_or_roll","level_direction_rule","exceptions","version"],"invariants":["Level direction families share a coherent reference under the selected projection.","Camera tilt is distinguished from subject tilt."],"validation_checks":["vanishing_alignment_check","repeated_object_eye_level_check","tilt_roll_check"],"failure_signatures":["multiple_accidental_horizons","drifting_eye_level","vertical_tilt_confusion"],"domain_examples":["room_horizon","street_eye_level","aerial_tilted_view","spherical_equator_reference"]}

### Projection Family Specification (`projection_family_specification`)

The declared mathematical or constructive mapping family from spatial points and directions to the representation surface, including preserved properties and known distortions.

Semantic canonical mapping retained the complete legacy component record: {"slug":"projection_family_specification","name":"Projection Family Specification","component_type":"transformation_specification","maturity":"reusable","definition":"The declared mathematical or constructive mapping family from spatial points and directions to the representation surface, including preserved properties and known distortions.","required_fields":["family","projector_model","surface","preserved_properties","distorted_properties","valid_field","seam_or_singularity_policy","rationale"],"invariants":["One family governs a region unless hybrid boundaries say otherwise.","Preservation claims match the actual transformation."],"validation_checks":["anchor_projection_check","family_property_check","field_boundary_check","inverse_or_reconstruction_test"],"failure_signatures":["family_mixing","false_metric_claim","seam_discontinuity","undocumented_local_warp"],"domain_examples":["central_linear","orthographic","oblique","axonometric","cylindrical","spherical","reverse"]}

### Vanishing and Direction Structure (`vanishing_and_direction_structure`)

A map from spatial direction families to image vanishing points, lines, curves, or parallel projectors, with rules for nonparallel and curved geometry.

Semantic canonical mapping retained the complete legacy component record: {"slug":"vanishing_and_direction_structure","name":"Vanishing and Direction Structure","component_type":"geometry_record","maturity":"reusable","definition":"A map from spatial direction families to image vanishing points, lines, curves, or parallel projectors, with rules for nonparallel and curved geometry.","required_fields":["direction_families","vanishing_entities","horizon_relation","parallel_exceptions","curved_geometry_rule","construction_evidence"],"invariants":["Collinear or parallel spatial families follow the declared projection relation.","Curves are not forced into line rules without approximation disclosure."],"validation_checks":["convergence_overlay","direction_family_sample","off_frame_vanishing_check"],"failure_signatures":["incompatible_convergence","guessed_local_vanishing","curve_line_confusion"],"domain_examples":["one_point_room","two_point_building","three_point_tower","curvilinear_grid"]}

### Measuring and Scale-Recession Rule (`measuring_and_scale_recession_rule`)

The construction that transfers known lengths, repeated intervals, and comparable object scale through depth under the selected projection.

Semantic canonical mapping retained the complete legacy component record: {"slug":"measuring_and_scale_recession_rule","name":"Measuring and Scale-Recession Rule","component_type":"measurement_rule","maturity":"reusable","definition":"The construction that transfers known lengths, repeated intervals, and comparable object scale through depth under the selected projection.","required_fields":["reference_measure","measuring_relation","interval_rule","depth_axis","scale_behavior","error_tolerance","calibration_anchors"],"invariants":["Equal reference objects follow one scale rule at equivalent depth and orientation.","Symbolic scale departures are annotated."],"validation_checks":["repeated_interval_check","known_dimension_overlay","alternate_view_scale_check"],"failure_signatures":["arbitrary_shrinking","inconsistent_figures","false_distance","symbolic_scale_unmarked"],"domain_examples":["floor_tile_grid","receding_columns","figure_scale_line","axonometric_axis_scale"]}

### Foreshortening and Orientation Model (`foreshortening_and_orientation_model`)

A model of how oriented lengths, planes, circles, bodies, and silhouettes change under the projection and viewing relation.

Semantic canonical mapping retained the complete legacy component record: {"slug":"foreshortening_and_orientation_model","name":"Foreshortening and Orientation Model","component_type":"geometry_model","maturity":"reusable","definition":"A model of how oriented lengths, planes, circles, bodies, and silhouettes change under the projection and viewing relation.","required_fields":["object_orientation","local_axes","section_planes","projected_length_rule","ellipse_rule","silhouette_anchors","tolerance"],"invariants":["Apparent shortening follows orientation and projection rather than object identity.","Circular sections use a defensible projected conic or expressive annotation."],"validation_checks":["axis_projection_check","ellipse_axis_check","silhouette_check","section_comparison"],"failure_signatures":["flat_volume","bent_cylinder","frontalized_plane","arbitrary_ellipse"],"domain_examples":["reclining_figure","wheel_in_perspective","stair_tread","rotated_machine_part"]}

### Occlusion and Depth-Order Map (`occlusion_and_depth_order_map`)

The explicit front/behind/intersection/transparency/hidden-surface relation among objects, surfaces, edges, and view regions.

Semantic canonical mapping retained the complete legacy component record: {"slug":"occlusion_and_depth_order_map","name":"Occlusion and Depth-Order Map","component_type":"relation_map","maturity":"reusable","definition":"The explicit front/behind/intersection/transparency/hidden-surface relation among objects, surfaces, edges, and view regions.","required_fields":["entities","depth_order","intersections","visibility","transparency","hidden_edges","ambiguity","exceptions"],"invariants":["Occlusion relations do not form impossible cycles in a single opaque view.","Hidden is distinguishable from absent or deleted."],"validation_checks":["depth_sort_check","intersection_check","silhouette_tangent_check","hidden_edge_review"],"failure_signatures":["impossible_overlap","front_back_reversal","missing_intersection","hidden_context_erasure"],"domain_examples":["figure_group","architectural_massing","exploded_diagram","transparent_section"]}

### Perceptual Depth-Cue Hierarchy (`perceptual_depth_cue_hierarchy`)

A prioritized system for overlap, size, vertical placement, texture, atmosphere, focus, color, shading, stereopsis, motion, and other cues used to reinforce or intentionally complicate depth.

Semantic canonical mapping retained the complete legacy component record: {"slug":"perceptual_depth_cue_hierarchy","name":"Perceptual Depth-Cue Hierarchy","component_type":"cue_policy","maturity":"reusable","definition":"A prioritized system for overlap, size, vertical placement, texture, atmosphere, focus, color, shading, stereopsis, motion, and other cues used to reinforce or intentionally complicate depth.","required_fields":["cue_inventory","priority","audience_assumptions","conflicts","redundancy","inaccessible_cues","intended_ambiguity"],"invariants":["Critical depth never depends on an untested single cue when consequences are high.","Cue conflicts are deliberate and documented."],"validation_checks":["cue_isolation_test","reduced_color_test","blur_focus_test","audience_depth_reading_probe"],"failure_signatures":["contradictory_cues","flattened_scene","unintended_depth_reversal","inaccessible_encoding"],"domain_examples":["aerial_landscape","monochrome_diagram","VR_scene","children_illustration"]}

### Projection Distortion Budget (`projection_distortion_budget`)

Region- and use-specific tolerances for angular, scale, shape, area, distance, edge, and perceptual distortion introduced by projection, lens, field, or deliberate transformation.

Semantic canonical mapping retained the complete legacy component record: {"slug":"projection_distortion_budget","name":"Projection Distortion Budget","component_type":"constraint","maturity":"reusable","definition":"Region- and use-specific tolerances for angular, scale, shape, area, distance, edge, and perceptual distortion introduced by projection, lens, field, or deliberate transformation.","required_fields":["distortion_types","region_map","thresholds","intended_use","measurement_method","exceptions","disclosure_level"],"invariants":["Tolerance is tighter where decisions are more consequential.","Intentional distortion remains distinguishable from residual error."],"validation_checks":["grid_residual_check","edge_stretch_check","known_shape_check","user_interpretation_check"],"failure_signatures":["unbounded_edge_stretch","local_warp","realistic_but_false_scale","hidden_lens_distortion"],"domain_examples":["wide_angle_render","panorama","architectural_hero_view","expressive_figure"]}

### Anchor and Constraint Set (`anchor_and_constraint_set`)

Known points, lines, dimensions, alignments, visibility requirements, silhouettes, and relationships protected during construction and expressive revision.

Semantic canonical mapping retained the complete legacy component record: {"slug":"anchor_and_constraint_set","name":"Anchor and Constraint Set","component_type":"constraint_set","maturity":"reusable","definition":"Known points, lines, dimensions, alignments, visibility requirements, silhouettes, and relationships protected during construction and expressive revision.","required_fields":["anchors","source","confidence","constraint_type","tolerance","priority","conflict_rule","owner"],"invariants":["High-priority anchors cannot move without a recorded exception.","Conflicting anchors trigger review rather than silent compromise."],"validation_checks":["anchor_residual_report","constraint_conflict_check","version_diff"],"failure_signatures":["anchor_drift","incompatible_reference","overconstrained_scene","hidden_exception"],"domain_examples":["survey_points","human_scale_figure","horizon_line","facade_grid","composition_focal_anchor"]}

### Viewpoint-Induced Omission Record (`viewpoint_induced_omission_record`)

A record of spatial relations, people, impacts, access routes, surfaces, contexts, or uncertainties hidden, cropped, compressed, or de-emphasized by the selected station and frame.

Semantic canonical mapping retained the complete legacy component record: {"slug":"viewpoint_induced_omission_record","name":"Viewpoint-Induced Omission Record","component_type":"disclosure_record","maturity":"reusable","definition":"A record of spatial relations, people, impacts, access routes, surfaces, contexts, or uncertainties hidden, cropped, compressed, or de-emphasized by the selected station and frame.","required_fields":["omitted_entity_or_relation","cause","consequence","affected_party","alternate_evidence","disclosure","reviewer"],"invariants":["Hidden information is not treated as nonexistence.","Consequential omission receives alternate evidence."],"validation_checks":["alternate_view_review","affected_party_check","crop_comparison","access_safety_context_check"],"failure_signatures":["hero_view_laundering","access_erasure","context_minimization","unrepresentative_station"],"domain_examples":["urban_development_render","museum_display","landscape_intervention","safety_visualization"]}

### Perspective Validation Plan (`perspective_validation_plan`)

The set of geometric, perceptual, technical, audience, accessibility, and inference tests that determine whether the depth representation is fit for release.

Semantic canonical mapping retained the complete legacy component record: {"slug":"perspective_validation_plan","name":"Perspective Validation Plan","component_type":"validation_plan","maturity":"reusable","definition":"The set of geometric, perceptual, technical, audience, accessibility, and inference tests that determine whether the depth representation is fit for release.","required_fields":["claims","tests","samples","anchors","tolerances","reviewers","evidence","failure_action","signoff"],"invariants":["Every material spatial claim has a test or explicit uncertainty boundary.","Failed checks block or qualify release."],"validation_checks":["test_coverage_check","independent_review","evidence_link_check","release_gate"],"failure_signatures":["visual_inspection_only","no_boundary_cases","unchecked_measurement_claim","missing_signoff"],"domain_examples":["overlay_review","plan_section_crosscheck","audience_probe","photogrammetric_residual"]} Consolidated omitted legacy component records: [{"slug":"intentional_distortion_annotation","name":"Intentional Distortion Annotation","component_type":"rationale_record","maturity":"reusable","definition":"A record of deliberate geometric, scale, viewpoint, temporal, or cue departures and the expressive, narrative, symbolic, cultural, or communication purpose they serve.","required_fields":["departure","affected_region","rationale","protected_anchors","expected_reading","misreading_risk","disclosure"],"invariants":["Intent is recorded before or during revision, not invented solely after failure.","Technical inference limits update with the distortion."],"validation_checks":["rationale_review","anchor_check","audience_interpretation_probe","disclosure_check"],"failure_signatures":["post_hoc_expression_claim","unbounded_distortion","deceptive_realism","missing_inference_update"],"domain_examples":["symbolic_figure_scale","reverse_perspective_icon","cubist_compound_view","cinematic_forced_perspective"]},{"slug":"accessibility_and_alternate_view_plan","name":"Accessibility and Alternate-View Plan","component_type":"accessibility_plan","maturity":"reusable","definition":"A plan for redundant, descriptive, tactile, sonic, sectional, plan, diagrammatic, or alternate- viewpoint representations when essential depth cannot be recovered through one visual cue set.","required_fields":["essential_relations","audience_needs","alternate_modes","equivalence_limits","testing","delivery","owner"],"invariants":["Alternate representations preserve decision-critical relations.","Accessibility is tested with intended users where feasible."],"validation_checks":["mode_equivalence_check","contrast_color_check","description_review","user_test"],"failure_signatures":["decorative_alt_text","color_only_depth","stereopsis_only_relation","alternate_view_contradiction"],"domain_examples":["tactile_plan","audio_spatial_description","labeled_section","high_contrast_depth_map"]},{"slug":"release_and_reconstruction_boundary","name":"Release and Reconstruction Boundary","component_type":"inference_boundary","maturity":"reusable","definition":"A statement of which positions, dimensions, angles, areas, volumes, visibility relations, or spatial claims may be inferred or reconstructed and which remain uncertain or invalid.","required_fields":["permitted_inferences","prohibited_inferences","calibration","accuracy","region","reconstruction_method","uncertainty","expiry"],"invariants":["Visual plausibility never expands the permitted inference set.","Calibration and reconstruction metadata remain linked to the released version."],"validation_checks":["claim_metadata_match","reconstruction_test","measurement_warning_check","version_link"],"failure_signatures":["false_measurement_affordance","uncalibrated_reconstruction","missing_warning","stale_calibration"],"domain_examples":["architectural_render_notice","calibrated_photo","technical_axonometer","conceptual_artwork"]},{"slug":"light_shadow_and_atmosphere_model","name":"Light, Shadow, and Atmosphere Model","component_type":"optional_environment_model","maturity":"reusable","definition":"A model of illumination, cast and form shadow, haze, aerial perspective, color shift, and edge attenuation used to support depth and environmental meaning.","required_fields":["light_sources","atmosphere","shadow_geometry","value_color_rules","time_condition","exceptions"],"invariants":["cast_shadows_follow_declared_light","atmospheric_cues_do_not_claim_metric_distance_without_calibration"],"validation_checks":["shadow_direction_check","depth_cue_conflict_check","alternate_light_condition"],"failure_signatures":["impossible_shadow","atmospheric_flattening","inconsistent_sun","aesthetic_haze_hides_impact"],"domain_examples":["landscape_aerial_perspective","architectural_shadow_view","dramatic_painting","foggy_scene"]},{"slug":"moving_viewer_or_camera_path","name":"Moving Viewer or Camera Path","component_type":"optional_sequence_model","maturity":"reusable","definition":"A versioned sequence or continuous path of stations, orientations, lenses, and timing that governs parallax, reveal, occlusion, and continuity across views.","required_fields":["path","stations","orientation","timing","lens_or_field","transitions","collision_or_access","intended_reveal"],"invariants":["path_continuity_is_declared","cuts_or_jumps_are_explicit","critical_objects_preserve_identity"],"validation_checks":["parallax_check","continuity_check","collision_access_check","reveal_order_review"],"failure_signatures":["spatial_disorientation","impossible_camera_move","hidden_cut","inaccessible_view_path"],"domain_examples":["cinema_dolly","VR_navigation","anamorphic_view_path","museum_walkthrough"]},{"slug":"cultural_perspective_convention_note","name":"Cultural Perspective Convention Note","component_type":"optional_context_record","maturity":"reusable","definition":"A record of culturally and historically situated spatial conventions, symbolic scale, viewpoint plurality, reading order, and interpretive authority relevant to the work.","required_fields":["tradition_or_context","convention","source_authority","intended_audience","meaning","misuse_risk","consultation"],"invariants":["linear_perspective_not_assumed_universal","community_authority_and_attribution_preserved"],"validation_checks":["source_review","cultural_context_review","attribution_check","audience_interpretation_probe"],"failure_signatures":["deficit_framing","decontextualized_borrowing","false_universalism","symbolic_scale_misread"],"domain_examples":["icon_reverse_perspective","East_Asian_parallel_or_shifted_view","maps_with_symbolic_scale","compound_narrative_space"]},{"slug":"calibration_and_lens_model","name":"Calibration and Lens Model","component_type":"optional_calibration_record","maturity":"reusable","definition":"Camera, lens, sensor, image, distortion, pose, and uncertainty parameters required to relate captured pixels to rays or spatial reconstruction.","required_fields":["camera_model","focal_or_projection_parameters","principal_point","distortion","image_geometry","pose","calibration_data","residuals","validity"],"invariants":["calibration_matches_capture_version","residuals_and_valid_field_are_reported"],"validation_checks":["reprojection_error","calibration_target_check","lens_profile_version","independent_anchor"],"failure_signatures":["wrong_lens_profile","cropped_uncalibrated_image","hidden_distortion_correction","overclaimed_accuracy"],"domain_examples":["photogrammetry","architectural_photo_match","computer_vision_overlay","virtual_camera"]},{"slug":"multi_view_crosswalk","name":"Multi-View Crosswalk","component_type":"optional_traceability_map","maturity":"reusable","definition":"A mapping of object identities, anchor points, dimensions, hidden relations, and revisions across plans, elevations, sections, perspective views, images, models, and interactive states.","required_fields":["view_set","entity_ids","anchor_links","transform_or_correspondence","conflicts","hidden_relations","version"],"invariants":["same_entity_identity_is_stable","contradictions_are_recorded","view_specific_absence_is_not_deletion"],"validation_checks":["cross_view_anchor_check","object_identity_check","dimension_conflict_review","version_parity"],"failure_signatures":["cross_view_mismatch","renamed_entity_loss","inconsistent_revision","hidden_relation_untracked"],"domain_examples":["architectural_sheet_set","storyboard_scene_model","museum_reconstruction","technical_manual"]}]

prose_common_mechanisms:
### Perspective Grid Construction (`perspective_grid_construction`)

**Type:** `procedure`

Build a reusable plane or volume lattice consistent with the declared horizon, station, vanishing, and measuring relations.

Selection constraints and retained implementation evidence: projection_family; horizon; station_point; picture_plane; direction_families; base_measure; depth_extent; Complete legacy mechanism record retained: {"slug":"perspective_grid_construction","name":"Perspective Grid Construction","mechanism_type":"procedure","maturity":"reusable","purpose":"Build a reusable plane or volume lattice consistent with the declared horizon, station, vanishing, and measuring relations.","inputs":["projection_family","horizon","station_point","picture_plane","direction_families","base_measure","depth_extent"],"procedure":["Establish base plane, horizon, vanishing entities, and a calibrated near interval.","Propagate receding lines and transverse intervals through the selected measuring construction.","Extend verticals or other axes according to the projection family.","Mark confidence and distortion boundaries outside the stable field."],"outputs":["grid_geometry","interval_scale","construction_anchors","valid_field"],"safeguards":["do_not_force_curved_or_irregular_subjects_into_linear_grid","keep_grid_version_linked_to_view"],"verification":["anchor_overlay","repeated_interval_check","alternate_view_comparison"],"failure_signatures":["grid_drift","arbitrary_spacing","incompatible_vanishing_points","false_precision"]}

### Vanishing-Point Convergence Layout (`vanishing_point_convergence_layout`)

**Type:** `representation`

Map linear spatial direction families to one or more vanishing entities under central projection.

Selection constraints and retained implementation evidence: direction_families; station_point; picture_plane; horizon; camera_tilt; field_of_view; Complete legacy mechanism record retained: {"slug":"vanishing_point_convergence_layout","name":"Vanishing-Point Convergence Layout","mechanism_type":"representation","maturity":"reusable","purpose":"Map linear spatial direction families to one or more vanishing entities under central projection.","inputs":["direction_families","station_point","picture_plane","horizon","camera_tilt","field_of_view"],"procedure":["Classify parallel or dominant direction families.","Project representative directions to the picture plane.","Locate vanishing points or lines, including off-frame positions.","Test subject edges against the declared family rather than snapping every line blindly."],"outputs":["vanishing_structure","horizon_relation","edge_family_labels","exception_list"],"safeguards":["preserve_curved_geometry","avoid_close_vanishing_points_that_create_unintended_stretch"],"verification":["convergence_residual_overlay","horizon_consistency","copied_reference_conflict_check"],"failure_signatures":["multiple_accidental_horizons","twisted_boxes","forced_convergence","edge_stretch"]}

### Measuring-Point Interval Transfer (`measuring_point_interval_transfer`)

**Type:** `construction_method`

Transfer known equal or proportional intervals into depth under linear or related projective construction.

Selection constraints and retained implementation evidence: base_measure; measuring_line; vanishing_structure; depth_axis; reference_scale; Complete legacy mechanism record retained: {"slug":"measuring_point_interval_transfer","name":"Measuring-Point Interval Transfer","mechanism_type":"construction_method","maturity":"reusable","purpose":"Transfer known equal or proportional intervals into depth under linear or related projective construction.","inputs":["base_measure","measuring_line","vanishing_structure","depth_axis","reference_scale"],"procedure":["Establish a true or calibrated reference interval.","Locate the applicable measuring relation.","Project diagonals or transfer rays to successive depth positions.","Verify several intervals against anchors or a reference model."],"outputs":["receding_interval_set","scale_recession_evidence","error_estimate"],"safeguards":["do_not_apply_one_family_measure_to_incompatible_axes","disclose_symbolic_scale_departure"],"verification":["known_dimension_check","repeated_object_overlay","inverse_transfer_test"],"failure_signatures":["arbitrary_shrinking","accumulated_interval_error","wrong_axis_measure","scale_discontinuity"]}

### Orthographic or Axonometric View Set (`orthographic_axonometric_view_set`)

**Type:** `representation`

Produce one or more parallel-projection views for comparison, construction, or simultaneous face visibility.

Selection constraints and retained implementation evidence: reference_model; projection_direction; axis_scale_factors; view_set; hidden_line_policy; section_policy; Complete legacy mechanism record retained: {"slug":"orthographic_axonometric_view_set","name":"Orthographic or Axonometric View Set","mechanism_type":"representation","maturity":"reusable","purpose":"Produce one or more parallel-projection views for comparison, construction, or simultaneous face visibility.","inputs":["reference_model","projection_direction","axis_scale_factors","view_set","hidden_line_policy","section_policy"],"procedure":["Select orthographic, isometric, dimetric, trimetric, or oblique rules.","Project geometry with parallel projectors and declared axis scales.","Mark hidden, cut, or omitted relations.","Cross-reference anchors and dimensions across the view set."],"outputs":["parallel_projection_views","axis_scale_record","hidden_relation_note","cross_view_anchors"],"safeguards":["do_not_claim_optical_naturalism","label_nonuniform_axis_scales","separate_diagrammatic_explosion"],"verification":["parallelism_check","axis_scale_check","orthographic_crosswalk","model_overlay"],"failure_signatures":["mixed_projection","direct_measurement_overclaim","hidden_line_ambiguity","inconsistent_views"]}

### Curvilinear Field Mapping (`curvilinear_field_mapping`)

**Type:** `transformation`

Map a wide angular field or plural directions to a cylindrical, spherical, fisheye, or other curved coordinate surface.

Selection constraints and retained implementation evidence: ray_field; target_surface; angular_extent; seam_policy; pole_policy; output_frame; Complete legacy mechanism record retained: {"slug":"curvilinear_field_mapping","name":"Curvilinear Field Mapping","mechanism_type":"transformation","maturity":"reusable","purpose":"Map a wide angular field or plural directions to a cylindrical, spherical, fisheye, or other curved coordinate surface.","inputs":["ray_field","target_surface","angular_extent","seam_policy","pole_policy","output_frame"],"procedure":["Select mapping and coordinate convention.","Transform rays or source samples to the curved field.","Place seams and poles away from critical content where possible.","Measure local scale and shape distortion across the output."],"outputs":["curvilinear_view","distortion_map","seam_and_pole_record","valid_field"],"safeguards":["disclose_mapping","preserve_orientation_cues","do_not_offer_uniform_measurement_without_correction"],"verification":["known_line_curve_test","angular_anchor_check","seam_continuity","local_distortion_report"],"failure_signatures":["seam_break","pole_compression","unacknowledged_fisheye","orientation_loss"]}

### Occlusion and Silhouette Check (`occlusion_and_silhouette_check`)

**Type:** `test_or_assessment`

Verify visible surfaces, depth ordering, intersections, tangencies, transparent relations, and object-identifying silhouettes.

Selection constraints and retained implementation evidence: projected_scene; depth_order_map; reference_model; transparency_policy; critical_silhouettes; Complete legacy mechanism record retained: {"slug":"occlusion_and_silhouette_check","name":"Occlusion and Silhouette Check","mechanism_type":"test_or_assessment","maturity":"reusable","purpose":"Verify visible surfaces, depth ordering, intersections, tangencies, transparent relations, and object-identifying silhouettes.","inputs":["projected_scene","depth_order_map","reference_model","transparency_policy","critical_silhouettes"],"procedure":["Compare projected depth ordering against reference relations.","Inspect intersections, tangencies, and hidden edges.","Test silhouettes at critical orientations and scales.","Record intentional ambiguity or fragmentation."],"outputs":["occlusion_error_list","silhouette_findings","intersection_findings","correction_actions"],"safeguards":["do_not_treat_hidden_as_absent","include_accessibility_and_safety_objects"],"verification":["depth_buffer_or_manual_sort","alternate_view_review","edge_trace_overlay"],"failure_signatures":["impossible_overlap","floating_object","missing_contact","silhouette_identity_loss"]}

### Scale and Foreshortening Overlay (`scale_foreshortening_overlay`)

**Type:** `test_or_assessment`

Compare projected sizes, orientations, ellipses, repeated forms, and known anchors against expected geometry.

Selection constraints and retained implementation evidence: released_or_working_view; anchors; scale_rule; orientation_model; reference_geometry; tolerance; Complete legacy mechanism record retained: {"slug":"scale_foreshortening_overlay","name":"Scale and Foreshortening Overlay","mechanism_type":"test_or_assessment","maturity":"reusable","purpose":"Compare projected sizes, orientations, ellipses, repeated forms, and known anchors against expected geometry.","inputs":["released_or_working_view","anchors","scale_rule","orientation_model","reference_geometry","tolerance"],"procedure":["Overlay anchor points and direction axes.","Compare repeated-object size against depth.","Check projected lengths, ellipse axes, and silhouettes.","Separate intended distortion from residual error."],"outputs":["residual_map","out_of_tolerance_regions","distortion_annotations","revision_list"],"safeguards":["respect_expressive_license","do_not_hide_large_residuals_under_style"],"verification":["independent_overlay","multiple_anchor_sample","alternative_projection_check"],"failure_signatures":["scale_jump","frontalized_form","arbitrary_ellipse","post_hoc_expression_claim"]}

### Atmospheric Depth-Cue Pass (`atmospheric_depth_cue_pass`)

**Type:** `design_method`

Coordinate value contrast, chroma, edge sharpness, texture frequency, focus, haze, and light to reinforce or intentionally complicate recession.

Selection constraints and retained implementation evidence: geometric_depth_map; light_atmosphere_model; cue_hierarchy; focal_plan; audience_and_medium; Complete legacy mechanism record retained: {"slug":"atmospheric_depth_cue_pass","name":"Atmospheric Depth-Cue Pass","mechanism_type":"design_method","maturity":"reusable","purpose":"Coordinate value contrast, chroma, edge sharpness, texture frequency, focus, haze, and light to reinforce or intentionally complicate recession.","inputs":["geometric_depth_map","light_atmosphere_model","cue_hierarchy","focal_plan","audience_and_medium"],"procedure":["Rank depth cues by purpose and medium.","Apply distance-dependent cue changes with controlled exceptions.","Compare with geometric ordering and focal emphasis.","Test grayscale, reduced-color, blur, and alternate viewing conditions."],"outputs":["depth_cue_layer","cue_exception_record","accessibility_findings","conflict_report"],"safeguards":["do_not_use_haze_to_hide_impact","avoid_color_only_critical_depth","disclose_nonphysical_atmosphere"],"verification":["cue_isolation_test","audience_probe","geometric_conflict_check","output_medium_test"],"failure_signatures":["flattened_distance","reversed_depth","inaccessible_color_cue","misleading_atmosphere"]}

### Alternate-View and Section Validation (`alternate_view_section_validation`)

**Type:** `test_or_assessment`

Check a perspective representation against plans, elevations, sections, models, photos, or other viewpoints.

Selection constraints and retained implementation evidence: perspective_view; alternate_view_set; multi_view_crosswalk; anchors; claims; tolerances; Complete legacy mechanism record retained: {"slug":"alternate_view_section_validation","name":"Alternate-View and Section Validation","mechanism_type":"test_or_assessment","maturity":"reusable","purpose":"Check a perspective representation against plans, elevations, sections, models, photos, or other viewpoints.","inputs":["perspective_view","alternate_view_set","multi_view_crosswalk","anchors","claims","tolerances"],"procedure":["Link common entities and anchors across views.","Compare dimensions, visibility, adjacency, circulation, and impact.","Identify contradictions and viewpoint-specific omission.","Resolve, qualify, or disclose each material difference."],"outputs":["cross_view_validation_report","contradictions","omissions","qualified_claims","signoff"],"safeguards":["preserve_view_specific_uncertainty","include_consequential_nonhero_views"],"verification":["anchor_parity","version_parity","reviewer_signoff","reconstruction_sample"],"failure_signatures":["cross_view_mismatch","stale_model","omitted_access_path","unresolved_contradiction"]}

### Viewpoint-Omission Audit (`viewpoint_omission_audit`)

**Type:** `governance_or_review`

Review what the selected station, field, crop, focal hierarchy, and projection hide, minimize, enlarge, or make inaccessible.

Selection constraints and retained implementation evidence: released_view; viewpoint_record; crop; reference_model; affected_party_map; decision_context; alternate_views; Complete legacy mechanism record retained: {"slug":"viewpoint_omission_audit","name":"Viewpoint-Omission Audit","mechanism_type":"governance_or_review","maturity":"reusable","purpose":"Review what the selected station, field, crop, focal hierarchy, and projection hide, minimize, enlarge, or make inaccessible.","inputs":["released_view","viewpoint_record","crop","reference_model","affected_party_map","decision_context","alternate_views"],"procedure":["Inventory hidden and cropped entities and relations.","Assess consequence, affected parties, and rhetorical effect.","Compare representative alternate stations and conditions.","Add evidence, revise the view, or record a justified limitation."],"outputs":["omission_register","alternate_evidence_plan","revisions","disclosure","reviewer_record"],"safeguards":["include_access_safety_ecology_and_power","protect_sensitive_spatial_detail","avoid_token_alternate_views"],"verification":["affected_party_review","alternate_station_sample","disclosure_check","decision_artifact_parity"],"failure_signatures":["hero_view_laundering","access_erasure","impact_minimization","privacy_exposure"]}

prose_failure_modes:
Incompatible vanishing structures twist objects; establish direction families and run convergence
overlays. Arbitrary scale recession misplaces equal objects; use measuring relations and anchors.
Bad ellipse and foreshortening construction flattens forms; validate section planes, axes, and
silhouettes.

Contradictory depth cues create unintended ambiguity; define cue hierarchy. Wide-angle edge stretch
exaggerates forms; narrow, curve, segment, or disclose. Viewpoint laundering hides impact; audit
omission and show alternate evidence. Cultural overreach treats linear perspective as universal;
record convention and assess internal logic.

False measurement affordance invites invalid decisions; provide calibrated orthographic evidence
and inference boundaries. Inaccessible depth encoding excludes viewers; add outlines, labels,
descriptions, tactile/sonic translation, sections, or multiple cues.

prose_neighbor_distinctions:
Viewer Participation and Embodied Interpretation requires movement or action to complete meaning;
this archetype can model that path but produces a depth representation. Site-Responsive Spatial
Abstraction designs actual place; this archetype designs its view.

Scale Reframing changes analytical level rather than pictorial recession. Ambiguity-Exploitation in
Visual Metaphor manages multiple readings rather than spatial accuracy. Relational Grounding
Verification audits frame dependence; here the frame is constructed. Cognitive Representation
Externalization covers many artifact forms and lacks projective invariants.

Epistemic and social perspectives remain outside scope. The queue's art-specific definition,
aliases, ontology path, and spatial parent primes constrain this draft to representation of depth.

prose_cross_domain_examples:
An architectural team builds eye-level views of a plaza from measured plans and a shared model,
validates them against sections, and adds accessibility and winter-shadow views absent from the
hero image. A painter constructs an interior with one-point geometry, then documents deliberate
figure enlargement used for narrative emphasis.

A technical illustrator selects axonometric projection to reveal three faces while preserving
parallelism, links anchors to orthographic views, and labels the limits of direct measurement. A
cinematographer defines camera and lens paths, tests parallax and occlusion through a set, and
maintains horizon continuity across cuts.

A museum uses a compound perspective diagram alongside tactile and verbal spatial descriptions so
visitors can understand an inaccessible archaeological site without mistaking one reconstructed
view for complete evidence.

prose_non_examples:
A cross-cultural exercise asking learners to understand another worldview uses perspective in an
epistemic sense. A policy dashboard switching from neighborhood to national aggregation is scale
reframing. A light installation responding to an actual site's seasonal sun is site-responsive
spatial abstraction unless the task is specifically to design its projected view.

A topological transit diagram may intentionally discard visual depth. A plan whose primary promise
is geographic measurement follows a mapping contract. A realistic render created only as surface
style, with no material spatial decision, may use isolated mechanisms but does not require the full
archetype.

prose_tradeoffs:
Central perspective improves fixed-view coherence but distorts lengths, angles, and edge forms.
Parallel projection preserves comparison but can weaken optical depth. A single viewpoint unifies
composition but hides surfaces. Multiple views expand coverage but can fragment orientation.

Strict geometry supports audit and reconstruction but may constrain expression. Expressive
distortion supports narrative or symbolic meaning but can undermine trust when presented as
evidence. Redundant depth cues support access and robust perception but increase visual load.

Wide fields increase immersion and context while increasing edge distortion. Detailed disclosure
improves accountability while sometimes interrupting aesthetic experience; the solution is layered
evidence, not silent omission.

### Ethical And Safety Considerations

Perspective is rhetorical. Camera height, focal choice, crop, foreground obstruction, atmospheric
clarity, and relative scale can make a proposal appear spacious, safe, empty, crowded, dominant, or
insignificant. Public-facing architecture and planning views should disclose representative
conditions and include access, shadow, context, and affected-party views when material.

Do not use persuasive spatial realism to launder surveillance, military, carceral, extractive, or
displacement decisions. Review authority, necessity, affected parties, and likely harm. Preserve
privacy when spatial detail exposes homes, routines, protected sites, or vulnerabilities.

Avoid grading culturally situated spatial systems as errors merely because they do not use
Renaissance linear perspective. Accessibility should not be an afterthought: depth critical to a
decision needs redundant encoding.

prose_invariants_to_preserve:
The projection family and observer relation remain declared. Direction families, horizon, and
scale behavior remain internally coherent except where departures are explicitly annotated.
Known anchors do not drift silently. Occlusion and intersections preserve intended spatial order.
Depth-cue conflicts are resolved deliberately.

The representation never claims completeness from one viewpoint. Hidden and cropped relations
remain distinguishable from absent objects. Visual realism never substitutes for measurement
evidence. Alternate cultural systems are assessed against their own declared spatial logic rather
than a default linear-perspective rubric.

Accessibility and safety are representation invariants when essential decisions depend on depth.
Revision must preserve a trace from released view to the reference model and validation evidence.

prose_target_outcomes:
The intended audience reads depth, orientation, and scale coherently enough for the stated purpose.
Objects occupy defensible relations, and deliberate distortions serve rather than accidentally
undermine meaning. Technical users understand which properties can be measured or reconstructed.
Public users can see consequential context that a hero viewpoint would otherwise conceal.

The artifact remains useful when the medium, image size, or viewing condition changes within the
validated range. Alternate views and accessible translations carry critical relations across
audiences. Reviewers can reconstruct why a projection was selected and how errors were tested.

Success is not maximum illusion. A diagram, icon, plan-perspective hybrid, or reverse-perspective
work may succeed through clarity, cultural fit, or expressive truth rather than optical naturalism.

prose_parameter_dimensions:
Projection family is the primary structural parameter. Central projection makes rays converge at a
station point and usually creates vanishing points. Parallel projection preserves a view direction
and may preserve selected scale relationships. Curvilinear systems map rays to a curved coordinate
field. Compound systems join multiple local views and therefore need explicit seams or translation
rules.

Station point and eye level control which surfaces are visible, where the horizon falls, and how
the scene distributes dominance. A low view may monumentalize; a high view may expose layout while
reducing embodied scale. Field of view controls inclusion and edge stretch. Viewpoint plurality
controls coverage and interpretive unity.

Geometric fidelity ranges from expressive coherence to measurement-grade reconstruction. The
label should determine validation, not visual realism. A photorealistic image can be metrically
weak; a sparse axonometric can be highly auditable.

Depth-cue density determines resilience. Overlap and relative size may suffice for a diagram;
atmosphere, texture, focus, shadows, stereopsis, or motion may help immersive or naturalistic work.
Redundancy improves access but can increase clutter. Distortion disclosure ranges from internal
construction notes to public comparisons and reconstruction metadata.

prose_variants_and_near_names:
One-point perspective organizes one dominant receding direction around a frontal view. Two-point
perspective rotates the subject so two horizontal direction families converge. Three-point
perspective adds vertical convergence for dramatic up/down views.

Orthographic and axonometric variants use parallel projectors and support construction or
comparison. Curvilinear and panoramic variants distribute wide fields across curved coordinates.
Expressive, reverse, and plural variants use internally legible departures for icon traditions,
cubist space, narrative emphasis, or simultaneous viewpoints.

Atmospheric perspective is handled as a component/mechanism layer rather than a separate full
archetype. A perspective grid is likewise a mechanism. Viewpoint selection is required but
insufficient on its own.

One-Point Linear Perspective

variant_type: other

short_definition: Construct a view dominated by one receding direction while frontal planes remain aligned to the picture plane.

distinct_from_parent: the subject is rotated materially against the picture plane

distinct_from_parent: a wide view creates severe edge distortion

still_same_parent_because: One principal direction family converges to a vanishing point on the horizon; orthogonal frontal directions retain the declared picture-plane relation.

use_when: interiors, corridors, roads, tracks, tunnels, or staged frontal spaces dominate

use_when: centered or deliberately offset axial attention supports the composition

example_domains: interiors, corridors, roads, tracks, tunnels, or staged frontal spaces dominate

example_domains: centered or deliberately offset axial attention supports the composition

failure_modes: figures and furnishings placed by eye rather than the grid

failure_modes: false assumption that all receding edges share the same direction family

Two-Point Linear Perspective

short_definition: Represent rotated boxes, buildings, streets, or objects with two horizontal receding direction families.

distinct_from_parent: direct measurement or face comparison is the primary purpose

still_same_parent_because: The two horizontal direction families converge to separate vanishing points on one declared horizon while verticals follow the selected vertical rule.

use_when: corner views, street grids, product forms, and architectural masses need optical recession

example_domains: corner views, street grids, product forms, and architectural masses need optical recession

failure_modes: incompatible horizons across copied references

failure_modes: vertical drift introduced without a three-point rationale

Three-Point or Vertical Perspective

short_definition: Represent tall structures, aerial views, or dramatic low/high stations where vertical directions also converge.

distinct_from_parent: public communication would mistake dramatic convergence for typical human experience

still_same_parent_because: Vertical convergence is tied to camera tilt or view geometry rather than applied as arbitrary taper, and horizontal direction families retain a coherent horizon relation.

use_when: skyscrapers, cliffs, aerial scenes, and embodied up/down views are consequential

example_domains: skyscrapers, cliffs, aerial scenes, and embodied up/down views are consequential

failure_modes:
exaggerated monumentality
unstable vertical scale
hidden ground-plane or access context

name: Orthographic or Axonometric Depth Representation

short_definition: Show spatial relations through parallel projection for comparison, construction, diagrammatic clarity, or simultaneous visibility of several faces.

distinct_from_parent: naturalistic optical experience is the primary promise

still_same_parent_because: Projectors remain parallel and scale behavior follows the declared orthographic, isometric, dimetric, trimetric, or oblique rule.

use_when: fabrication, technical communication, comparison, exploded views, or diagrams dominate

example_domains: fabrication, technical communication, comparison, exploded views, or diagrams dominate

failure_modes: axonometric drawing presented as dimensionally uniform when axes have different scales

failure_modes: hidden relations omitted without indication

failure_modes: optical depth cues contradict parallel projection

Curvilinear or Panoramic Perspective

short_definition: Represent a wide field, immersive view, or multiple view directions through declared curved coordinate mapping.

distinct_from_parent: users need uniform direct measurement across the image

still_same_parent_because: Rays or directions map consistently to cylindrical, spherical, fisheye, or another declared surface; seams and poles receive explicit handling.

use_when: panoramas, domes, VR, wide-angle views, or broad environmental context matter

example_domains: panoramas, domes, VR, wide-angle views, or broad environmental context matter

failure_modes: rectilinear objects judged by an incompatible expectation

name: Expressive, Reverse, or Plural Perspective

short_definition: Use reverse convergence, symbolic scale, multiple viewpoints, or deliberate spatial inconsistency to serve narrative, cultural, spiritual, diagrammatic, or experiential meaning.

distinct_from_parent: technical users may mistake the result for metric evidence without annotation

still_same_parent_because: Departures remain patterned and connected to stated meaning; viewers can distinguish the intended spatial language from accidental failure or deceptive realism.

use_when: icon traditions, reverse perspective, cubist space, diagrams, memory views, or narrative emphasis require plurality

failure_modes: cultural convention labeled as primitive or erroneous

failure_modes: arbitrary inconsistency defended after the fact as expression

failure_modes: symbolic enlargement misread as physical scale

near_names:
Spatial Depth Representation Design
Perspective Construction
Projected Depth Composition
Viewpoint Based Space Construction
Pictorial Perspective System Design