GI hits: lighter material evaluation (coarse base colour, geometric normal, no normal map) #984

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opened 2026-10-23 18:07:42 +00:00 by sky_line · 0 comments

sky_line commented

2026-10-23 18:07:42 +00:00

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A diffuse bounce barely sees fine material detail. A lighter evaluation at GI hits (coarse mip base colour, geometric normal, no normal map) would save about 0.3-0.8 ms. Subtle visual change. Medium effort.

From the 2026-10-23 GI performance pass. Baseline: RTX 5090, 4K, DLSS Ultra Performance (1280x720 render), GI at full render resolution, GI 3 + cache, ReSTIR DI 3, emissive on: GPU 30.9 ms/frame (GPU-bound), async deferred lighting 20.1 ms, `c_gi_trace` 12.7 ms (883k rays/frame). A diffuse bounce barely sees fine material detail. A lighter evaluation at GI hits (coarse mip base colour, geometric normal, no normal map) would save about 0.3-0.8 ms. Subtle visual change. Medium effort.

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sky_line added this to the Slipstream project

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sky_line self-assigned this

2026-10-26 02:58:24 +00:00