The Future of Light Propagation Volumes

[Efrye]

@BobJoel;520296

I do experience this behavior, but I didn’t realize it was so dramatic until I set up my own test scene with default parameters. When I first started experimenting with LPV (long ago), the very first thing I did was to turn up Light Injection Bias to ~3 in order to prevent light bleeding with thin meshes; I’ve stuck with that ever since. It cuts down dramatically on glancing light bounces, and in turn I never had such an extreme brightening effect within the LPV radius to begin with. Also, in terms of it being noticeable, it helps that I have the LPV radius / volume size in sync with where cascaded shadows end (and DF shadows begin).

I have to agree, the implementation of cascades would be brilliant.

Thanks, that’s good to know. It seems unlikely that Epic would add a major new feature to LPVs, but I’ll just have to keep bugging them about it!

@Adik;520310

I don’t know why people still stick to LPV, it’s a extremely outdated technology, it has bad performance, bad quality and lots of issues.

What else could I stick to? VXGI appears to be the only real alternative in UE4, and from what I’m being told performance is worse than LPV and it doesn’t work on consoles. So it’s not even an option for most games. Using only a sky light for dynamic outdoor illumination certainly can’t be the answer either.