Blender Git Loki

Clay Engine: Improve sampling of SSAO

Replace completly random noise by Blue noisen, giving a better aspect.
Also randomize the distance in the sample direction to cover the whole distance even with 1 sample. Using another blue noise for this.
Replace spiral samples (that had tendency to align if the number of samples was near the chosen constant) with Hammersley samples that have good coverage even for low number of samples.
Use a UBO instead of Texture (a bit less latency) making things a tiny bit faster.
Move the noise data to the SceneLayerData, because each render layer can have a different sample count.

PyAPI: correct exception, expect 'staticmethod'

Cleanup: Remove unused code to set mode

This code is not used anymore in viewport with new modes

Eevee: Move Spherical Harmonics to a new Probe UBO.

Keep data packing tight to prevent use of padding floats

Fix alembic tests not running with debug build on windows

DwM: skip background-set objects w/ selection

Eevee: Modify Blue Noise.

World: Add temporary update flag.

Eevee: Material code refactor.

Separate material handling inside another file.
Make use of enums to identify shader variations.
Group all 64*64 LUTs into one array texture.
Only update world probe if world changes.

WIP: Basic structure for new object modes

Now there are 3 modes: Edit, Paint and Sculpt strokes.

These modes are only for new GP object.

Notice: Now the paint and sculpt modes can be activated but don't work.

Remove Edit Strokes mode for scene

This mode is not necessary because the mode is added at object level and the scene level is not available anymore.

Fix T51587: Blender fails to interpret a specific layer in OpenEXR multilayer file

PyAPI: Cleanup "Python API Overview" doc

Reword to clean up some odd grammar (mostly dangling modifiers) and
improve readability.

Differential Revision: https://developer.blender.org/D2699

Fix T51691: Shear cursor input scales w/ zoom

Use relative value from cursor movement.

Merge branch 'blender2.8' into greasepencil-object

Disable datablock at scene level

Now to paint in 3D view is necessary to add a GPencil object

Set Object mode as default for new strokes

Convert always scene GP datablock to new GPencil object

Cleanup: rewrite some lines for tab key

Fix tab key for Edit Strokes after Workspaces merge

The tab key for enter in edit mode for GPencil objects was not working with new workspaces.

Still there is a problem with datablocks at Scene level (TBD)