Saved WebGL2 captures of the real webgpu_shadowmap example. The initial stock/patch comparison differs in only 3 of 576,000 pixels. Each changes by one value in a single 8-bit RGB channel.
webgpu_shadowmap
The crops preserve the original colors. Magenta marks every changed pixel at full intensity so you can locate it; it does not represent the size or color of the actual change.
Open original stock PNG · Open original patch PNG
The repeat Stock → Patch pair was pixel-identical. Two captures of the same patched build differed in one pixel by one channel value. That supports render/capture variability; it does not establish the exact cause. The WebGPU example comparisons were pixel-identical.
Back to validation gallery · Initial WebGL2 measurements · Repeat controls