Blender Git Loki

Fix T77204: Mantaflow Initial velocity bugged?

Always initialize the particle velocity of newly sampled particles to 0 if there are no initial velocities. Clearing the grid source makes sure that new particles will get a 0 velocity - and not interpolated from the associated grid.

Fix: Displace Modifier UV Layer UI not a pointer

The displace modifier's uv_layer property should be a pointer in the new
UI like the other modifiers use.

Differential Revision: https://developer.blender.org/D7990

Fix T70193 Overlay: Grid floor disappears for orthographic camera

The fix is to disable the fading for in the +Z direction in this case.

GPencil: Ensure previous brush is set when change mode

In some situations, the previous brush is not set. This usually happens with previous version files.

Related to T78155.

Fix T77285: Incorrect Mantaflow fluid border interaction when collision is turned off

Incorrect boolean for 'open' domain borders.

Cleanup: Don't use "Use" in boolean names

Experimental Features: Use different "categories" for different features

Right now not all the features available there have the same level of
polishing. So I split the existing options in:

* New Features [Particles Nodes]
* Prototypes [Hair]
* Debugging [Undo]

Differential Revision: https://developer.blender.org/D8121

Fix T78238: issue loading existing .blend files with Optix viewport denoiser

Also add additional validation to ensure the denoiser is supported before
trying to use it.

Fix incorrect Python API description for bpy.data.version

Ref T76058

Revert "Fix T78071: Drivers reading object visibility not updating automatically"

This reverts commit baa0da3e69a1225cd18c075be5563c7d811b5347.

The commit causes some issues I didn't foresee, I'd rather take the time
to do it properly than hastily try and commit a fix for it.

Cleanup: spelling

Fix T78071: Drivers reading object visibility not updating automatically

An object can be targeted by a driver that reads its `hide_viewport` or
`hide_render` property. The existence of such a driver will create a
relation between the 'sync base flags' depsgrpah node, and the datablock
containing the driver. When the object is hidden, however, it has no
base, and thus it had no 'sync base flags' depsgraph node. To support
such a driver, that depsgraph node is now always added, but for hidden
objects it will just be a no-op. If the node is not used by anything, it
will be automatically disconnected and have a negligible effect on
performance.

Cycles: add support for rendering sculpt vertex colors

Ref T78041

Build: remove unused lapack/hidapi/mingw32 build infrastructure

Ref T76184

Build: upgrade OpenImageDenoise to 1.2.1

This requires ISPC for building OpenImageDenoise, so that is now added as
a dependency as well. Blender itself does not need ISPC for building so it
is not included as part of the precompiled libraries.

Differential Revision: https://developer.blender.org/D7641

Build: upgrade a few smaller Linux/macOS only libraries to latest versions

* jemalloc 5.2.1
* xml2 2.9.10
* bzip2 1.0.8
* ffi 3.3
* lzma 5.2.5
* ssl 1.1.1g
* sqlite 3.31.1

Ref T78252

Fix viewport denoising not working if start samples higher than total samples

Python API: add methods to allow copying of constraints.

Blender has an operator to do Copy & Paste of constraints between
objects and bones, but no simple method to do that directly via
the Python API is provided. This adds a copy() method to object
and pose bone constraint collections.

Differential Revision: https://developer.blender.org/D8112

Better fix for crash ( with gpu only ) on render end/abort introduced in 0dced1a

Cleanup: spelling