Blender Git Loki

Simplyified mutl_face_search (should now be more robust too)

cleanup: fixed indentation and white space issues

Cleanup: Fix comment

New grease pencil primitive STROKE

This creates a simple stroke with several colors to have a basic structure to start drawing.

Cycles: Light tree: volume and MIS fixes

Now using a more reliable way of knowing if a shading point
is inside or on the boundary of a volume.

Fixed a bug in light_background_sample() that used an index
into the lights array as an index into the distribution array.

Cycles: Light tree split heuristic fix

Doubles are no longer needed in the split heuristic
calculations.

Cycles: Picking position and normal fix for MIS

The picking position and normal has been changed to
use the position and normal from the last
non-transparent bounce.

Cycles: Light tree: Area light fix

The bounding boxes for area lights was not calculated
properly but has now been fixed.

Cycles: Light tree: energy and light picking fixes

When calculating the energy for a light source I previously returned
zero energy if is_constant_emission() returned false. This has now
been changed so it uses an emission of (1,1,1) instead.

The normal that is used for light picking for the BSDF approximation
in the importance calculations now takes into consideration if the
point is on glass, a reflective or transmissive surface. The position
and normal used for light picking is now stored in the ShaderData struct.

Cycles: Light tree instancing and energy fixes

Instancing for mesh lights now works with the light tree.
The conversion from emission to luminance is now using
linear_rgb_to_gray() instead.

Replace wrong aasign material flag to BKE_MAT_ASSIGN_USERPREF

Benchmark: rename executable to blender-benchmark and disable argument parsing.

Merge branch 'master' into fluid-mantaflow

GPUShader: Fix warning in release build.

Add missing single user management for grease pencil materials

Fix benchmark submodule revision and Python/GLEW build error.

allow grid spacing > 1

minor cleanups

Bugfix: audaspace cmake variables need to be cached.

Fix T56217: Segment Fault when using the Fill Brush on Blank GP Object

The error was in any GP object without layers.

Also added a check to avoid paint in a locked layer.