Blender Git Loki

WM: de-duplicate operator append code

WM_operatortype_append(_ptr) functions had diverged.

PyAPI: is_staticmethod used for classmethods's too

Add note to investigate this, don't change so close to release.

PyAPI: correct exception, expect 'staticmethod'

DwM: skip background-set objects w/ selection

Merge branch 'blender2.8' into custom-manipulators

Fix alembic tests not running with debug build on windows

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.

improvements to the pointcache

fixed a problem where caching would not resume after restarting the simulation. also, cache file names are now a bit nicer

Eevee: Modify Blue Noise.

prefer vector handle on adaptive keyframe in convert to keyframed objects

Clip brush UI

fix attempt for particle systems supporting dynamicly changing vertexgroups

added softlight,exclusion,luminocity,saturtion,hue blend modes

Eevee: Move Spherical Harmonics to a new Probe UBO.

Keep data packing tight to prevent use of padding floats

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.

World: Add temporary update flag.

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

crash fix and attempt to reduce unnecessary memory usage

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