catbot 1e749818ef fix(webgpu): reshape wavefront TRACE/SHADE to 2-D to survive >4.19M rays ... A 1-D indirect dispatch of ceil(W*H/64) workgroups for the wavefront TRACE/SHADE stages overflows maxComputeWorkgroupsPerDimension (65535 on Dawn/Firefox) once the surface exceeds ~4.19M rays (~2560x1640). Per the WebGPU spec such a dispatch is silently dropped — no validation error — so at 4K the world is never traced and the accumulator stays black while non-RT passes survive. _wfPrep now spreads the workgroups across a 2-D grid (x clamped to 65535, y = ceil(wg/65535)), and the wfTrace/wfShade entry points rebuild the linear ray index from (global_invocation_id, num_workgroups). The existing `i >= _wfCurCount()` guard absorbs the grid overshoot. GENERATE/RESOLVE already use a 2-D tile dispatch and are unchanged. Verified in Firefox/WebGPU with RTStress at a 3449x1739 surface (5.99M rays, 93716 workgroups — well over the 65535 cap): renders the full cube grid where master shows a black screen. Resolves #11 Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>		2026-06-01 11:09:15 +00:00
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dom-env.js	webgpu improvements	2026-05-24 13:32:08 +02:00
dom-webgpu.js	fix(webgpu): reshape wavefront TRACE/SHADE to 2-D to survive >4.19M rays	2026-06-01 11:09:15 +00:00