This is a new global illumination system meant to supersede SDFGI.
Key advantages are:

* Much, much faster. Significantly lower frame time, orders of magnitude faster cascade updates whem moving.
* Generally higher quality (less arctifacting).
* Much better occclusion (a _lot_ less light leaked).
* Less memory usage.

It is meant as a drop-in replacement. Should work as a replacement for SDFGI.

Known issues:

- [ ] For some reason gets DEVICE LOST on Intel GPUs. No idea why.
- [ ] Sharp Reflections  not always play good with TAA (wobbly).

Future:

- [ ] Dynamic object support.
- [ ] High density mode (sub-probes).

Please test and report issues!

Made transparent objects use less strict probe blending.

- Fixed roughness
- Fixed dither (no need to  use by default the filter)
- Fixed probe filter