Blender Git Loki

Implement initial smoke modifier instancing

Add noop OpenVDB modifier

Print grid names

Initial noop openvdb import operator

OpenVDB groundwork

Cycles: Fixes for equiangular area light PDf.

Cycles: Fixed equiangular area light sampling.

For some reason, light samples didn't contain the correct normal
of the light source when performing equiangular sampling.
Now it's explicitly fetching it from the lights array.

Cycles: Improved eqiuangular sampling for spot lights.

When doing equiangular sampling, it now first clips the ray to the
intersection of the spot light cone.

Cycles: Improved equiangular sampling.

For area lights that emit light only in one direction, equiangular
sampling will now not sample any positions on the back side
of the light.

Merge 'master' into 'feature_overrides'

Merge 'master' into 'feature_overrides'

Merge 'master' into 'feature_overrides'

Merge 'master' into 'cycles_texture_cache'

Merge 'master' into 'cycles_texture_cache'

Merge 'master' into 'cycles_texture_cache'

Merge 'master' into 'cycles_adaptive_sampling'

Merge 'master' into 'cycles_adaptive_sampling'

Merge 'master' into 'cycles_adaptive_sampling'

Cycles: Fixed a typo in sample_is_even().

Merge branch 'cycles_adaptive_sampling' of github.com:skwerner/blender into cycles_adaptive_sampling