If you want to try doing gloss/filtering for the cubemap I found this personally helpful years ago, maybe you will too? https://research.activision.com/publica ... ion-probes

Hi boris, would it be possible to change the mip level of environment maps used on meshes based on the spec map? Right now it's all just the same spec map, making it hard to pull off good looking materials. But there's tools to precalculate how rough the environment map should be based on spec, whic...

Figuring out a way to get the solid fog to become exponential height fog would be very cool, IMO. Lowering the fog contribution the higher in altitude the worldspace position of a pixel is would do it, exponential heightfog is in common use today. That being said technically the weird "fade to ...