https://github.com/weakknight/restirpass

ReSTIR Pass For Falcor
https://github.com/weakknight/restirpass

Last synced: about 1 month ago
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ReSTIR Pass For Falcor

• Host: GitHub
• URL: https://github.com/weakknight/restirpass
• Owner: WeakKnight
• Created: 2021-10-21T15:24:49.000Z (over 3 years ago)
• Default Branch: main
• Last Pushed: 2021-10-24T09:40:26.000Z (over 3 years ago)
• Last Synced: 2025-03-29T21:11:19.602Z (about 2 months ago)
• Language: C++
• Size: 2.71 MB
• Stars: 8
• Watchers: 1
• Forks: 1
• Open Issues: 1
• Metadata Files:
  • Readme: readme.md

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README

        
# ReSTIR Pass

![result](images/result.png)  

a [Falcor](https://github.com/NVIDIAGameWorks/Falcor) render-pass for [ReSTIR](](https://research.nvidia.com/sites/default/files/pubs/2020-07_Spatiotemporal-reservoir-resampling/ReSTIR.pdf)) Based Direct Lighting, inspired by [RTXDI](https://developer.nvidia.com/rtxdi).

## How to use

Add this project into the Falcor solution.  

![file-tree-layout](images/layout.png)  

After building this pass, you can load the render graph scripts under the project folder via Mogwai.  

![render-graph-files](images/rendergraph.jpg)

## Limitations

> I only used Falcor Light Sampler, including a hierarchical environment map sampler(see [EnvMapSampler](https://github.com/NVIDIAGameWorks/Falcor/blob/5236495554f57a734cc815522d95ae9a7dfe458a/Source/Falcor/Experimental/Scene/Lights/EnvMapSampler.slang)) and an [Alias-Method](http://cgi.cs.mcgill.ca/~enewel3/posts/alias-method/index.html) power-based emissive triangle sampler(see [EmissivePowerSampler](https://github.com/NVIDIAGameWorks/Falcor/blob/5236495554f57a734cc815522d95ae9a7dfe458a/Source/Falcor/Experimental/Scene/Lights/EmissivePowerSampler.slang)). If you want to support more light types(such as point light, directional light) or more efficient light sampling techniques, you need to implement corresponding light samplers as initial sampling primitives.

> For simplicity, I used VBuffer instead of GBuffer, but VBuffer may lead to more computation overhead.

> I did not do tricks like Pre-Sampling, Decoupled Shading(see [HPG2021 Rearch ReSTIR](https://research.nvidia.com/publication/2021-07_Rearchitecting-Spatiotemporal-Resampling)). If you want to improve performance further, you need to implement this kind of thing by yourself.

> I only implemented spatial resampling de-bias. You need to implement temporal de-bias by yourself.