Blender Git Loki

Cycles Denoiser: Store debug info in one exr per tile instead of many pfms

Cycles Denoising: Fix pass handling with MSVC

Cycles: Move code to new and nicer file layout

Cycles: Remove old WLR filter

Cycles: Get rid of one loop over all denoised pixels by using backsubstitution instead of explicit inversion

Cycles: Move the final_pass functions to a unified implementation and generally shuffle a lot of code around

Cycles: Improve robustness of the Cholesky decomposition

Cycles: Implement Cross-Denoising

Right now this is pretty bad, but it can be made much better.

Layers - initial commit

This is mostly DNA + doversion and some util functions.
I need to look at the layer-manager branch to see how
Julian Eisel (Severin) managed to handle nested lists
(required for collections).

Also, since I think doversioning may get more complex as the project
evolves, I started the vesioning_280.c file.

And the changes in readfile.c were so that I could include into the
versioning_280.c file only the DNA_* that were really needed.

(if someone feels like doing a cleanup, I'm sure the other
versioning_*.c files could use the same treatment)

Merge branch 'master' into HMD_viewport

Conflicts:
source/blender/makesrna/intern/rna_userdef.c

Cycles: Remove unneeded lines in constructor

Since these were added to `device_memory` we don't need them in
`device_vector` as well.

Cycles: Minor style change

Cycles: Remove uses of nullptr

We're avoiding C++11 language features for now.

Cycles: Simpler use of sizeof

Less likely to make mistakes later if something here needs to change.

Cycles: Add comment to explain disabled code

Merge branch 'master' into cycles_split_kernel

Cycles: Simplify and make atomics more clear

Somehow I missed the other versions of the atomic functions in
`atomic_ops.h`. This is just to switch to those to make the code
more clear.

bugfix / performance fix and new option "constrained collison"

bugfix: switching from kinematic to simulated should work now, performance improvements with dynamic fracture,
new option just exposes the disable collision flag to FM (works inverted here, enable it to let constrained objects collide, disable for default behavior)

Add a dropdown to support multiple lens-distortion shaders

Merge branch 'master' into HMD_viewport

Conflicts:
source/blender/blenloader/intern/versioning_270.c