Blender Git Loki

Set shape parameters per region and use them as per-guide attributes.

Eventually should also support scalp textures/vgroups as factors for
fine-grained control.

Support saving tiled images

Cleanup 2D tiled painting code by adding a temporary ImageUser

Support 2D painting onto tiled images

Currently, a limitation is that strokes can not cross between tiles, only the tile in which the stroke started will be affected.

Reenable clump feature for fibers with a simpler taper function.

Using the smoothstep function for taper means the hair stay parallel
after a certain distance, which seems a bit more realistic as well as
giving more control.

Change out-of-bounds color for tiled images in GLSL to match missing images

Merge remote-tracking branch 'origin/blender2.8' into udim

Support tiled textures in the viewport and in Eevee

Add commonly used strand draw settings to the hair system draw settings.

Merge branch 'master' into soc-2018-hair-shader

Use the latest Week 5 commits for build

Cleanup: store and retrieve parameters consistently

Merge remote-tracking branch 'origin/blender2.8' into temp-eeveelightcache

Merge remote-tracking branch 'origin/blender2.8' into temp-eeveelightcache

Add comments to review context creation in render

Add missing parameter after merge

Merge branch 'blender2.8' into greasepencil-object

Conflicts:
release/scripts/startup/bl_ui/space_view3d.py

Minor sparse tile fixes.

Fixed some really obvious errors with CUDA sampling, and moved the
coordinates to index calculation back into kernel, saving a small
perecentage of time.

Fix errors after merge

Merge branch 'blender2.8' into greasepencil-object

Conflicts:
source/blender/blenkernel/intern/object_update.c

Merge remote-tracking branch 'origin/blender2.8' into udim