Blender Git Loki

Fix shadow any-hit program not building and incorrect index being used

Move OptiX result check macros into utility header

Fix crash because of incorrect abort condition in shadow any-hit program

Disable megakernel for now since it is not implemented for OptiX

Add missing kernel globals

Enable OptiX device again

Add source groups for device files

Merge branch 'master' into cycles-x

Merge branch 'master' into cycles-x

Cycles: recorded N closest intersections for shadow rays in OptiX

Untested, but relatively straightforward compared to BVH2 and Embree.

Cycles: align Embree shadow ray implementation more closely to BVH2 and OptiX

Cycles: BVH2 changes for shadow path continuation

* Pass maximum ray distance to primitive intersection functions, rather
than reading it from the intersection.
* Return a factor to scale the ray distance from bvh_instance_push instead
of the ray distance.

Cycles: record N closest intersecton for shadow rays with BVH2

Cycles: Add mode and resolution to scheduler full report

Makes it easier to collect and compare statistics on different rigs.

Would also be nice to add platform information which is easily visible
from the report, but we don't yet have easy-to-use macros. Leaving this
for a later day.

Cycles: Report render scheduler information

Allows to have access to timing about how long specific tasks took
in terms of wall time and in average (per task, or per sample).

Helps with profiling, bottlenecks detection, time improvements
investigation of various steps.

Example report:

Render Scheduler Summary

Adaptive sampling:
Use: True
Step: 16
Min Samples: 18
Threshold: 0.002809

Denoiser:
Use: True
Type: OpenImageDenoise
Start Sample: 0
Passes: Color, Albedo, Normal

Time (in seconds):
Wall Average
Path Tracing 6.769805 0.019016
Adaptive Filter 0.044594 0.000133
Denoiser 0.634125 0.634125
Display Update 0.333205 0.066641

Total: 7.781729

Cycles: Move adaptive filter check to own function

No functional changes, just makes some development easier.

Cycles: Refactor adaptive sampling filtering work

Move the code to own function and own section of RenderWork.
Preparing for a more comprehensive logic which will progressively
be bringing down noise floor in viewport.

There could be some performance impact due to an extra parallel
for call over the render works, but in practice it should not be
measurable.

Cycles: Remove unused accumulation function

Fix adaptive sampling never stopping on NaN pixels

Clamp all passes in a way that they are finite. Fixes both adaptive
sampling and makes results usable for post-processing.

There is no speed regression with Classroom scene on GPU, so performance
is not expected to suffer from this change.

Cycles: Use per-pixel sample for convergence check

Currently there should be no functional changes, but this allows to
resume rendering once pixels converged to some threshold.