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Drive parallax height and relief from the painted occlusion channel

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Reuse the existing occlusion paint channel (no new map, MAP_COUNT stays 3):
0.5 is neutral, above 0.5 raises a hill, below 0.5 sinks a hole and also
fades ambient occlusion (saturate(2*occ)). Bind the MSO map to _ParallaxMap,
enable _PARALLAXMAP, derive a relief normal from the height gradient, and
reseed unpainted occlusion to 0.5 so untouched surfaces stay visually neutral.
Pin the _PARALLAXMAP runtime variant in the build keep-alive material.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
adminandClaude Opus 4.8 committed 2026-06-30 22:40:23 +02:00
1 parent e349446fb7
commit fdcb4f8d8a
6 files changed
+78 -13
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Assets/Scripts/MeshPainter.Backend.cs
+3 -2
View File
@@ -69,8 +69,9 @@ public partial class MeshPainter
switch (mi)
{
case MAP_ALBEDO: return new[] { "_BaseMap", "_MainTex" };
// One mask map drives both URP slots: _MetallicGlossMap (R/A) + _OcclusionMap (G).
case MAP_MSO: return new[] { "_MetallicGlossMap", "_OcclusionMap" };
// One mask map drives three URP slots: _MetallicGlossMap (R/A) + _OcclusionMap (G) +
// _ParallaxMap (G = occlusion reused as a 0.5-centred height for parallax/relief).
case MAP_MSO: return new[] { "_MetallicGlossMap", "_OcclusionMap", "_ParallaxMap" };
default: return new[] { "_EmissionMap" };
}
}