-Lighting fixes

-Fixed all missing models

-More brush entities converted to props
-Removed some small props
-Other small improvements

-AI nodes should work again (maybe)

-Fixed floating tree props

-Large props won't fade out anymore
-LOD improvements

-Prop placement changed

-Improved ai nodes (by Xenomorph 13)

-Improved prop normals, most notably on the ladder and the catwalk

-Made skybox edge 2d treeline cast shadows