Blender Git Loki

Fix UDIM grid being drawn too wide

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

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.

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

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

Add UDIM support to the Cycles Image node

SVM only for now, OSL will come later.

Rename IMA_SRC_UDIM to IMA_SRC_TILED

Support UDIMs in Image Space operators

Implement basic UDIM grid drawing

Automatically find and load all UDIM tiles even if only the 1001 tile is selected

Add first parts of UDIM support in the core image code

Internally, UDIMs are handled very similar to sequences - they consist of a list
of files (containing a sequential number in their name) that all belong to one
Image datablock. This means that existing code like the IBuf cache can be reused.

The current drawing and opening code are just a minimal implementation to test
the core code, they'll be improved of course.