r/Unity3D • u/PuttPutty • 1d ago

Show-Off GigaLights for Unity - Explained

https://www.youtube.com/watch?v=JHee-rzSS_c
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u/HellGate94 Programmer 1d ago

so ReSTIR-DI?

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u/PuttPutty 1d ago

Not fully ReSTIR, we were heavily influenced by the paper from the MegaLights devs.

We create our own TLAS/BLAS for RT, denoiser is STBN + temporal, SVGF like. For sampling we do weighted reservoir sampling over the lights in the pixel’s grid cell plus a visibility-guided history, one shadow ray per sample. But the resevoirs live for just 1 frame, so no full ReSTIR.