Blender Git Loki

Eevee: Silence warning

Eevee: Fix Exponent default in versioning code

Draw Manager: Fix crash when trying to order an empty shading group.

This fix crash when using only the volume output with an alpha blend material

Eevee: Effects: Split each effect in it's own file.

This also:
- make sure to only compile the shader needed by the active effects.
- same thing for the shading groups.
- disable TAA if motion blur is active (avoid infinite refresh).

Eevee: Fix Bad AO on opaque refractive geometry.

Eevee: SSR: Use max lod on planar reflections.

Mesh Auto-Smooth Split Normal Support

From D2906 with few changes

Merge branch 'master' into blender2.8

Fix bplayer (c)

Like seriously guys... twice within a few hours, compile full blender please
when you change APIs!

Layers: unittest update after workspace > engine changes

All tests working again now.
Remember to update the svn lib/tests/layers folder.

Merge branch 'master' into blender2.8

Prevent users to be able to override context engine

We expose engine as a string, yet context is dealing with Pointers. To prevent a crash
we may as well just forbid users to override it.

Experiment with adding output file meta data from render engine

The idea is to make it possible to report extra meta data from
render engine to the file writing. This way we can provide
additional information such as number of samples rendered by
resumable Cycles rendering so we can easily combine files back.

Currently only report number of samples from Cycles when rendering
a single render-layer scene. This is something what was required
here at the studio. We can easily extend that further.

Ideally we would also need to support non-string metadata, but
that's for later.

Reviewers: mont29, campbellbarton

Reviewed By: mont29, campbellbarton

Subscribers: sybren, candreacchio

Differential Revision: https://developer.blender.org/D2502

Add ability for render engines to report extra meta data to pipeline

Add ability to specify custom fields to be saved from render result

Stamp info: Use dedicated function to free up memory

This way it's more flexible to extend StampData structure
with additional stuff which might require memory free.

Workspace cleanup: engine_id is in ViewRender

Fix bplayer (c)

Collections: Bring back simple visibility behaviour

If an object is in any visible collection, the object will be visible.
This behaviour has changed in 9ad2c0b6154b.

If it will change again, it will be for:
https://developer.blender.org/D2878

Tracking: Create mesh from selected tracks only

Patch by Sebastian Koenig. thanks!