SSGI (screen-space global illumination) in WebGPU. Technically this is 'near-fi...

Alex Goldring (@SoftEngineer)

2026-01-23 | ❤️ 155 | 🔁 11 | 💬 4

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SSGI (screen-space global illumination) in WebGPU.

Technically this is “near-field diffuse screen-space ray-traced indirect lighting”.

We trace SSAO, and as we sweep arcs - we also integrate lighting along the occluded arc.

This is a very natural extension to GTAO or any other horizon-based technique, as it already sweeps arcs.

The irradiance is encoded in a u32 texture using rgb999e5, so it’s quite compact.

I’m not doing any denoising here, in practice you would apply at least spatial denoising.

Writeup: https://discourse.threejs.org/t/ssgi-screen-space-global-illumination/85190

🔗 원본 링크

• https://discourse.threejs.org/t/ssgi-screen-space-global-illumination/85190

미디어

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Tags

Rendering Dev-Tools Web-Graphics