Forward+ Decals
GPU driven tile culled decals that modify their surfaces PBR properties.
No additional draw calls for any decals.
* PBR modification: Albedo, Normal, Roughness, Metal, AO
* Works with transparent surfaces as it's not projecting based on depth
* Color Tinting + Opacity
* Angle attenuation
* Automatic sort order + override
* Future compataibility with extra data flags to add 100 more things
* Decal::Apply( ... ) API