Erik 16ed6e7c5c fix(render): keep authored surface translucency on composite textures ... The user reported wielded items subtly hiding particle effects, as if a translucent texture were missing. Root cause verified in source: the DAT authors a per-surface Translucency float, and the shared-atlas extraction honors it by baking (1 - Translucency) into the texture alpha (MeshExtractor). But a surface with an appearance override - ObjDesc subpalettes or texture changes, which wielded loot typically carries - routes through the per-instance composite paths instead (WbDrawDispatcher.ResolveTexture -> TextureCache GetOrUploadWithPaletteOverrideBindless / GetOrUploadWithOrigTextureOverrideBindless -> DecodeFromDats), and the textured decode there never saw the authored value: only the Base1Solid branch passed it (SurfaceDecoder.DecodeSolidColor); DecodeRenderSurface has no translucency input at all. Consequence: the part still classified translucent, still sorted in the RetailAlphaQueue, still drew with depth writes off - but with texture alpha = 1 it overwrote everything already composited behind it. Particles behind the part vanished; particles in front survived. The same GfxObj without overrides (atlas path) rendered correctly, which is why the loss was so selective and subtle. Fix: SurfaceDecoder.ApplyAuthoredTranslucency mirrors the atlas bake (in-place alpha scale, caller-owned buffers, Magenta sentinel guarded), and DecodeFromDats applies it behind an opt-in flag set by exactly the two world composite paths. The sky path stays unbaked (its shader applies the authored opacity separately - baking would double-apply, the AP-89 compounding class) and particle sheets stay unbaked (emitter-driven alpha, no authored-translucency consumer). Composite cache keys already include the surface id, so the baked alpha is cache-coherent. This closes an unregistered divergence (no register row existed; the fix restores parity with the shipped atlas mechanism, so none is added). Investigation evidence: equipped children and world objects share the same classification chain (ClassifyPackedBatches/GroupKey), so the gap was override-driven, not attachment-driven - a dropped item with the same ObjDesc was equally affected. Core SurfaceDecoder tests 22/22 (3 new); App Release suite 3,968 / 3 skips. Visual gate: a wielded item with authored-translucent parts must let its particle effects show through. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>		2026-07-29 21:40:26 +02:00
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DecodedTexture.cs	feat(core): add SurfaceDecoder for A8R8G8B8 and BCn formats	2026-04-10 17:56:15 +02:00
SurfaceDecoder.cs	fix(render): keep authored surface translucency on composite textures	2026-07-29 21:40:26 +02:00