Raytraced Light Sampling on Concave Edges Fixed (Patreon)

I've managed to fix this issue with lightmap points in the edges being obscured by neighboring brushes that forms concave edges with the brush of the current surface. The previous attempted solutions made the edges of the lightmaps too hard, but this new solution keeps the edges smooth.

Now that a good solution for this was implemented, I'm going to optimize the raytracing code more by precomputing some coords during load time.