atdunbg
5d88ed2057
Root causes behind blurry/unphysical materials (4K pocket watch render mushy, glass fully opaque, watch hands unreadable): - Textures loaded via stbi had a single mip level: 4096x4096 albedo/MR maps sampled with no LOD -> minification aliasing turned fine detail (watch hands) into noise. Generate a full blit-based mip chain with per-level layout transitions. - samplerAnisotropy was never enabled on the device and every sampler was created with anisotropy disabled: grazing-angle surfaces (watch face, ground) collapsed into a blur. Enable the device feature and 16x anisotropic filtering on material texture samplers. - glTF baseColorFactor was ignored: the glass material (alphaMode BLEND, no baseColor texture, baseColorFactor.a = 0.3) fell back to the default white texture with alpha = 1 and rendered fully opaque. MaterialParams gains a baseColor vec4 (rgb tints albedo, a scales the blend alpha) threaded through both PBR shaders. - alphaMode MASK was treated as opaque: add a factors.w switch that performs an alpha cutout test in the opaque shader. - Fix material cache key dropping factors.z (separate-roughness switch); it now encodes the full factors and baseColor vectors.