Kappa Shader v3.0 Preview T3

Aside from the rewritten atmospheric scattering to have a more realistic sky there isn't anything major. Its mostly just tweaks and fixes in this stage of development.

Changelog:
- reworked cloud shape
- reworked cloud lighting
- fixed errors when disabling normalmaps
- fixed labPBR emission handling
- added water settings
- adjusted porosity effect
- increased bloom when underwater
- rewrote atmospheric scattering
- adjusted indirect lighting