Blender Git Loki

Fix #32903: bring cycles glsl up to date with latest changes.

Mask editor: create new mask when trying to create new vertex without active mask set

Fix #32913: missing cycles viewport update when toggling visibility in outliner
with V and R shortcut keys.

Fix #32905: Crash with Levels node when no input is connected.

Fix #32896: No compositor tree update with image input color space change

style cleanup

Fix #32904: strange pattern on subdivided cube with anistropic shader. Now
tangents from generated coordinates are computed per pixel on the fly, avoids
bad interpolation of singularities.

Cycles: OSL compile fixes.

Attempts to fix CUDA issues on sm 2.0 cards, still no luck getting motion blur
working, but this should make it not crash.

Also fix for wrong shutter time, should have been shorter.

Maybe hard limmit is good enough. Removing soft limmit for sky turbidity

Cycles: Sensible limmits for Sky Texture turbidity value

Fix cycles motion blur not working correct with shutter time > 2.0. The soft
limit is 2.0, and anything beyond that is extrapolation which might not work
so well but is still allowed.

Missing semicolons in intern/ghost/intern/GHOST_WindowCocoa.mm

Cycles / OSL:
* Layer Weight is now available in OSL.

minor changes
- stub from last commit was incorrect (copied old docs)
- decimator was making copy of quadric for no reason.
- correct typo

add a template for a stub script - runs the script relative to the currently open blend file.

Render: local light group option for materials, blender internal feature from
the render branch.

When a material is linked in and has a light group override, this can now use
a local group in the scene file, by replacing the linked light group with a
local group that has the same name. A use case might be controlling the specular
highlight on linked character's eyes per scene.

Patch from render branch by Pablo Vazquez.

Cycles: motion blur is now curved and passes exactly through the midpoint.

Previously it would only interpolate between the previous and next frame,
which meant it might not hit the current frame position.

Cycles: add Tangent input for Anisotropic BSDF.

Also refactor SVM BSDF code, preparing it to be shared with OSL.

Fix for OSL 'background' attributes (attributes that are not associated to a particular object). Atm this is only the 'ray_length' attribute.
Background attributes are used as fallback in two cases:
1) Non-object light samples (e.g. lamp shaders)
2) Fallback if no implicit object attribute can be found