Ray-cast's tone map as a standalone effect.
It gives the gray-ish filter that raycast usually has. And reducing white clipping when there's too much luminous effects in order to retain details in the bright areas, instead of just pure white blobs.
- Original code by: Rui (Ray-cast)
- References for the tone map's variations are listed in the effect file
- Ported to standalone effect by: KH40