adminandClaude Opus 4.8
c7ec12e6d9
- Split MeshPainter into partial classes (Setup/Backend/Gpu/Cpu) for maintainability - Add ambient occlusion painting, packed with metallic/smoothness into one MSO mask map (R=metallic, G=occlusion, A=smoothness) bound to both _MetallicGlossMap and _OcclusionMap, kept independently paintable via per-channel ColorMask - Gate painting from a single IsChannelActive source so AO-only strokes work - Blend albedo/emission in linear space on CPU to match the GPU framebuffer - Pre-compensate data-channel writes for sRGB->linear so GPU matches CPU - Harden GPU shader fallback to reflect real backend state Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
48 lines
1.5 KiB
Plaintext
48 lines
1.5 KiB
Plaintext
// Packs the mask-map WORK layout into the URP mask-map layout.
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//
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// While painting, the mask map is kept in a "work" RenderTexture as
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// R = metallic, G = smoothness, B = occlusion, A = coverage (painted marker for dilation).
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// This lets the same brush + dilate shaders (which use alpha as the coverage marker)
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// drive it exactly like the albedo map. The packed result is one texture bound to BOTH
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// _MetallicGlossMap (URP reads R = metallic, A = smoothness) and
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// _OcclusionMap (URP reads G = occlusion).
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// This pass converts work -> final after each stroke: out = (work.r, work.b, 0, work.g)
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// = (metallic, occlusion, 0, smoothness).
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//
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// Both work and final are linear RenderTextures (these are data, not color), so no gamma
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// conversion happens.
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Shader "Hidden/MeshPaintPackMS"
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{
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Properties
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{
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_MainTex ("Texture", 2D) = "white" {}
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}
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SubShader
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{
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Tags { "RenderType" = "Opaque" }
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Pass
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{
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ZTest Always
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ZWrite Off
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Cull Off
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Blend Off
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CGPROGRAM
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#pragma vertex vert_img
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#pragma fragment frag
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#include "UnityCG.cginc"
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sampler2D _MainTex;
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fixed4 frag (v2f_img i) : SV_Target
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{
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fixed4 c = tex2D(_MainTex, i.uv);
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// work (R=metallic, G=smoothness, B=occlusion) -> (metallic, occlusion, 0, smoothness)
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return fixed4(c.r, c.b, 0.0, c.g);
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}
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ENDCG
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}
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}
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Fallback Off
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}
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