- Use only one 2d texture array to store all shadowmaps.
- Allow to change shadow maps resolution.
- Do not output radial distance when rendering shadowmaps. This will allow fast rendering of shadowmaps when we will drop the use of geometry shaders.
We render linear distance to the light in a R32 texture and store it into an octahedron projection inside a 2D texture array.
This render the sampling function much more simpler and without edge artifacts.
