Blender Git Loki

big fluid particles update

- refactored original snd particle functions on mantaflow side
- bug fixes for particle reading (fixes disappearing issue when using
various ptypes at once)
- added support (esp. in caching) for future particle life vector (on
mantaflow it's side already in use. todo: copy values to blender
particle systems)
- memory optimization: only allocate particle fields when they're
actually enabled in UI
- fixed standalone script export (snd particle system, pdata fields)

Vertex Paint: fix feedback loop w/ smear tool

Was reading and writing from same array,
this also makes smear thread-safe.

Merge branch 'id_override_static' into asset-engine

Conflicts:
source/blender/editors/sculpt_paint/paint_vertex.c

Merge branch 'master' into id_override_static

Fix bplayer (c)

Fix T52981: 2D Curve shapes do not render untill extruded

Regression since 9298c53.

Merge branch 'master' into id_override_static

Change weigth paint accumulate mechanics to fix problems with mirroring.

Restoring weights is problematic when the stroke overlaps its mirror.
It's better to simply compute the new weight based on the saved data
rather than restoring things, and check that the change is monotonic.

This way is also closer to how things worked before the merge.

Vertex Paint: smear got wrong last-location

Error in last commit, weight must be set for non-accumulate

Merge branch 'master' into blender2.8

Notes:

- Changes in paint_vertex.c were simple to merge, mainly related on passing
evaluation context.

- Conflicts in EditDM and drawmesh.c are solved using code from blender2.8
branch. Those areas are deprecated and not to be used in final release.

However, it's possible that some reference code from master is lost, so
keep attention when adding alpha support for vertex painting.

Vertex Paint: remove accumulate (soc-2017-vertex_paint)

This secondary accumulation option accumulated brush falloff.
The same option in image painting accumulates color
as vertex paiht 'Spray' does.

Giving this option different behavior for vertex paint seems strange.
Also this is basically increasing falloff over time.

Remove the new code, expose existing 'Spray' as 'Accumulate'
to match other paint modes.

Weight Paint: don't set weight w/ average brush

Also use 'const' for brush.

Correct int division in last commit

Weight Paint: add some color blending modes

While these mostly make sense for color,
there is no harm in supporting.

Eevee : Fix grid black fill.

Gawain : Add workaround to fix bad sync of the program_in_use flag.

Merge branch 'blender2.8' into greasepencil-object

Eevee : Fix ghosting from probe data when toggling "only render".

Eevee : SSR : Make sure to not apply Specular Occlusion to SSR.

This makes the metals shine more.

Previous behaviour was not correct.