KappaPT Preview P1a (Patreon)

Oi, already time for a small update that irons out some stuff.

- added handling of carpets and buttons
- added a few more emitter mappings (end rods, shroomlight etc)
- made PT related settings more understandable
- added labPBR emission behaviour settings
- adjusted skylight intensity
- improved albedo based emission color behaviour
- minor exposure adjustments