39 lines
2.0 KiB
Markdown
39 lines
2.0 KiB
Markdown
# Terrain Material Layers Acceptance
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> **Evidence record — not current product guidance.** Use the [documentation index](../../../README.md) for current behavior and architecture.
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## Evidence
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The native Wayland editor is shown with the deterministic terrain showcase selected, two shared
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material layers visible in the Inspector, Paint active in the existing horizontal viewport toolbar,
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and the cyan terrain-following brush footprint over the blended PBR surface.
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## Live Acceptance
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- `Concrete` and `Surface Tint` blend continuously across all four generated chunks.
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- Layer assignment, clear, reorder, remove, UV tiling, and per-layer sample coverage are visible in
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the Terrain card without nesting a second panel.
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- Paint and Erase share the existing horizontal toolbar with layer, radius, and strength controls.
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- A Paint drag changed layer-two coverage from 13/25 to 16/25 samples and produced exactly one
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`Undo: Paint Terrain Material` history entry.
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- Ctrl+Z restored 13/25 samples; Ctrl+Y restored 16/25 samples.
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- The cyan footprint followed the actual sampled terrain surface and the transform gizmo remained
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absent while Paint owned viewport input.
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- Forward PBR and the project `blacksite_surface` terrain extension compiled without GPU pipeline
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errors. The invalid deferred-only prepass override found during QA was removed from both project
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material extensions.
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## Automated Coverage
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- Terrain layer/weight RON round-trip and structural validation.
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- RGBA8 normalization rejection and normalized vertex-color transport.
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- Paint/Erase normalization and brush-footprint isolation.
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- Multi-dab single-transaction undo/redo.
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- Exact restoration of an implicit pre-stroke weight map on cancel.
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Packaged build tests remain intentionally skipped per current project direction. Source workspace
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format/check/clippy/tests, project validation, navigation bake validation, and diff hygiene are the
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required gate for this ticket.
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