Blender Git Loki

Cycles: add animation denoising test, fix operator to work with single frames.

Cycles: backport samples metadata format changes to 2.7.

The render layer name is now always included. Best to keep these consistent,
so that animation denoising and sample merging works the same for both and
tests can be the same. Ref D4311.

Fix T61376 Group Node Node Editor theme property is missing alpha channel

It is now possible to adjust the group node background alpha.
The defaults are the same as before, but you can now adjust the alpha
level via the theme preferences (and the alpha value is no longer hard
coded).

GP: Avoid crash when bruhs setting are invalid

This change avoids crashes for wrong settings, but we need find why the settings were wrong.

Related to T61413

Cleanup: comments

UI: Use icon in Dopesheet 'Toggle Graph Editor' menu item.

UI: More descriptive labels for Metaball panel.

Also remove redundant "Resolution" label.

Merge branch 'blender2.7'

Fix T61362: Hair particles does not appear when rendering
Fix T61406: Particles don't render

Consider initial dependency graph evaluation as a file load.

Is still resetting too much, but that we can solve later.

Depsgraph: Use proper tag source for special case

Special case of handling update tag of 0 was using wrong update
source, causing unwanted point cache resets on file load.

Fix build error on macOS after recent changes.

Fix: Eevee SSS not rendering as expected

Remove forcing separate albedo when rendering. It was creating confusion.

Fix T61374 : vertex not visible/selectable if it is at objects origin

It was caused by Null normal if the vertex is at origin. Just add a small
bias to avoid this case.

Cleanup: avoid string copy for comparing int id's

More direct and readable.

Cycles: add animation denoising Python operator.

This adds a cycles.denoise_animation operator, which denoises an animation
sequence or individual file. Renders must be saved as multilayer EXR files
with denoising data passes.

By default file path and frame range come from the current scene, and EXR
files are denoised in-place. Alternatively, a different input and/or output
file path can be provided.

Denoising settings come from the current view layer. Renders can be denoised
again with different settings, as the original noisy image is preserved along
with other passes and metadata.

There is no user interface yet for this feature, that comes later.

Code by Lukas with modifications by Brecht. This feature was originally
developed for Tangent Animation, thanks for the support!

Differential Revision: https://developer.blender.org/D3889

Merge branch 'blender2.7'

Cycles: add animation denoising Python operator.

This adds a cycles.denoise_animation operator, which denoises an animation
sequence or individual file. Renders must be saved as multilayer EXR files
with denoising data passes.

By default file path and frame range come from the current scene, and EXR
files are denoised in-place. Alternatively, a different input and/or output
file path can be provided.

Denoising settings come from the current view layer. Renders can be denoised
again with different settings, as the original noisy image is preserved along
with other passes and metadata.

There is no user interface yet for this feature, that comes later.

Code by Lukas with modifications by Brecht. This feature was originally
developed for Tangent Animation, thanks for the support!

Cleanup: split user preferences out of wm.py

These operations are for handling preference related tasks so move into
into a preferences file.

Operators still need to be renamed.

Cycles: refactor Blender device settings handling into own file.

UI: show camera DOF UI for workbench engine