KappaPT Preview P6a (Patreon)

Oi, a small update before I start refactoring the pack to (hopefully) be able to squeeze out a few more FPS:

- minor filtering improvements, both quality- and performancewise
- added screenspace rough reflections and resourcepack reflections
-> worldspace reflections with the voxel volume will follow at some point after the refactor
- fixed a small error i made which slightly harmed normalmap accuracy with indirect lighting
- tweaked atmosphere ozone behaviour