Fixed #1770 (tabs disappear).
Use correct name for passthrough texture
Wrap azdo check into a function call
Precompute coefficient in gaussian blur pass
Same for shadow blur pass
Simplify sunlight shadow shader.
Use clamp mode for tex shadow
Revert "Simplify sunlight shadow shader."

This reverts commit cc7f95163c29a19d6905e2e99a76a62fbbd63578.
Use deferred shading instead of light prepass
Implement DFG LUT for phong specular
Use GGX D + Schlick G for BSDF and burley for Diffuse
Tweak down tonemap and gi impact
Fix for azdo