It's equivalent to the OpenImageDenoise prefiltering option in Cycles.
See D12043.
Prefilter modes:
- None: No prefiltering, use when guiding passes are noise-free.
- Fast: Denoise image and guiding passes together. Improves quality when
guiding passes are noisy using least amount of extra processing time.
- Accurate: Prefilter noisy guiding passes before denoising image.
Improves quality when guiding passes are noisy using extra
processing time.
Reviewed By: #compositing, jbakker, sergey
Differential Revision: https://developer.blender.org/D12342
Adds full frame implementation to Anti-Aliasing, Defocus, Denoise,
Despeckle, Dilate/Erode, Directional Blur, Filter, Inpaint and
Vector Blur nodes. The other nodes in "Filter" sub-menu are
submitted separately.
Part of T88150.
Reviewed By: jbakker
Differential Revision: https://developer.blender.org/D12219
Related to {T77023}. When using many Denoise nodes the memory in OIDN
are allocated up front. A mutex could stall the process until. This
change will allocate the memory after it received the lock.
