Add multipleImportanceSampling

[AntonPalmqvist]

Would be nice to be able to use multipleImportanceSampling as shown in this example

https://github.com/gkjohnson/three-gpu-pathtracer/blob/761dc09a21aff6c952fddd0d0e403cc97aeb13ca/example/materialBall.js

[FrostKiwi]

Would be nice to be able to use multipleImportanceSampling as shown in this example

https://github.com/gkjohnson/three-gpu-pathtracer/blob/761dc09a21aff6c952fddd0d0e403cc97aeb13ca/example/materialBall.js

Testing mrdoob/three.js#32067 (comment) I looked into this. Whilst the React wrapper doesn't publish this is a boolean prop, you can still turn it on via the usePathtracer() hook.

const { pathtracer } = usePathtracer();
pathtracer.multipleImportanceSampling = true;

This is true in general for all things React Three Fiber. Lot's of stuff not exposed, but reachable via Hooks.

[AntonPalmqvist]

I had a hunch that hooks was the way to go. Thanks for giving me that example code, it worked perfectly!
What I realized now however is that multipleImportanceSampling seems to be set to true by default already..