Blender Git Commits

Merge branch 'master' into cycles-x

Fix Cycles-X GPU rendering and OIDN denoiser

The issue was introduced in the initial baking support commit:
the `RenderBuffers::zero()` does not modify the CPU-size data,
so sequential call to `RenderBuffers::copy_to_device()` will
copy old data to the device.

Solved by not copying data to the device if there is no data
read, which is good thing to do anyway to avoid double data
copy to the device when no new data was provided.

Cycles X: Log effective list of passes

Useful for debugging purposes.

Log level can be tweaked to become 3 if 2 is considered
too low for this type of info.

Differential Revision: https://developer.blender.org/D11554

Cycles X: Store offset of first pass type

Will allow to simplify access to passes like AOV.

Differential Revision: https://developer.blender.org/D11553

Cycles X: Generalize pass flags storage

Use bitfield instead of individual boolean flags.

No functional changes.

Differential Revision: https://developer.blender.org/D11552

Cycles X: Move pass mapping outside of the class

No functional changes, just avoids use of class as a namespace,
and allows to modify the logic and signature a bit easier.

Differential Revision: https://developer.blender.org/D11551

Cleanup: remove unused code

Fix Cycles X viewport passes after baking changes

Changes in passes values breaks synchronization with the values
used for the UI menu.

Fix wrong half-float usage in Cycles X

Was generating strict compiler warning.

Probably not measurable for users since this was not code path
which is executed yet.

Fix Cycles X assert when writing Noisy Image pass

Fix Cycles X AOV writing not working

Cycles X: restore baking of more passes

The idea is to map baking settings to render passes. Still various passes
missing. In particular AO and Shadow (also missing for regular render) and
the complete filter options for light baking.

Some details of the implementation:
* The pass accessor can now read e.g. roughness into an RGBA image, which
is convenient for baking.
* ShaderEvalType is now only used for displace/background baking, no longer
part of the kernel and much smaller. Instead passes are used.
* Roughness render pass added for baking.
* Normals are baked as -1..1 just like the render pass, the Blender side
was updated since it expected 0..1 previously.

Differential Revision: https://developer.blender.org/D11534

Cycles X: cleanup for moving AO settings to only be part of integrator

Cycles X: first step to restore baking support

Minimal changes to get the baking pipeline operational, only bakes the Combined
pass.
* Add integrator_init_from_bake kernel, that reads the primitive and uv from
the render passes and sets up data structures for shade_surface.
* Add back support for reading render passes from Blender.

Since this reuses most of the path tracing code, baking now works with OptiX,
adaptive sampling and denoising.

Differential Revision: https://developer.blender.org/D11485

Merge branch 'master' into cycles-x

Cycles X: add path state compaction for GPU rendering

Before enqueing more work tiles, compact the path states so that all active
states are at the start. This improve coherence by avoiding paths from
different tiles to be interleaved.

It only provides minor performance benefits at this point, and only on
some GPUs. But it can be a useful building block for further optimizations.

Differential Revision: https://developer.blender.org/D11346

Cycles X: restore shader raytracing for AO and bevel nodes

Adds a dedicated shade_surface_raytrace kernel to avoid slowing down the other
shaders on the GPU, as happened before.

Differential Revision: https://developer.blender.org/D11418

Cycles X: tweak inlining flags in preparation of shader raytracing

No difference by itself, but will be needed to keep inlining behavior the same
after the addition of the new kernel.

Cleanup: remove unused KernelGlobals struct from OptiX kernels

Cleanup: fix various warnings when building CUDA/OptiX kernels