- Made shadow bias size independent, so it will remain when changing light or camera size.
- Implemented normal offset bias, which greatly enhances quality.
- Added transmission to subsurface scattering
- Reimplemented shadow filter modes
Closes#17260
The size settings are more "just works", with default scale and depth scale
values that don't need much tweaking.
Additionally, a "skin" mode was added so skin looks better.
EDIT: Cleaned up SSR filter shader a bit.
