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Working on probe placement for Global Illumination (WebGPU) * Tetrahedral Probe Mesh * SH3 (L2) irradiance * octahedral radiance 64x64 (atlased) * 8830 probes placed by the algorithm (including outside)

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Alex Goldring

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11,814 views • 5 months ago •via X (Twitter)

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Sparse Volumetric Light maps (WebGPU). Pretty happy with the current state. - Improved probe placement optimization, reducing light leaks - Worked on various smaller bugs light map stats: - VRAM Size: 20Mb - Probe samples: 16,384 - Probe count: 324,674 - Bake time: 267s - Bake hardware: RTX 4090
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Sparse Volumetric Light maps (WebGPU). Pretty happy with the current state. - Improved probe placement optimization, reducing light leaks - Worked on various smaller bugs light map stats: - VRAM Size: 20Mb - Probe samples: 16,384 - Probe count: 324,674 - Bake time: 267s - Bake hardware: RTX 4090

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Working on sparse volumetric light maps for WebGPU. Got generation part sorted. The resolution is adaptive, refining near geometry and skipping through most of the empty space. The video is question uses a map that's only 10MB in size, including everything. That's less the amount of GPU memory that a single leaf takes up on one of threes in the scene, or texture on one of the sign-posts. We get about 1 sample every 30 centimeters in the world space. As a side note: gave my renderer quite the workout, rendering each probe as a separate non-instanced mesh for debugging.

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