Blender Git Loki

Fix T53002: Batch-Generate Previews generate empty or none image for large objects.

Camera clipping was left to default values, which won't work well for
very large (or small) objects. Now recompute valid clipping start/end
based on boundingbox of rendered data, and final location of camera.

Fix T53001: more workarounds for crash in AMD compiler with recent drivers.

Code refactor: split displace/background into separate kernels, remove luma.

Sculpt Mode: 2D falloff option

This makes brush influence into a tube instead of a sphere.
It can be used along the outline of a mesh to adjust it's silhouette.

Note that all this takes advantage of changes from vertex paint,
from testing this seems useful so exposing from the brush options.

Vertex Paint: apply when cursor isn't over faces

This behavior makes more sense for sculpt, less so for painting.
Restores non PBVH behavior, adding `BKE_pbvh_find_nearest_to_ray` -
similar to ray-cast except it finds the closest point on the surface.

Cleanup: rename dist -> depth

Prepare to add code that stores distance to the ray, avoid confusion.

Cleanup: remove unused struct member

Merged with soc-2016-pbvh-painting, no longer needed.

Disable cursor drawing while navigating

Was performing ray-casts in sculpt mode on every update.

Fix sculpt secondary color missing some brushes

D2841 by @uvwxyz w/ edits

Cleanup: use bool for brush checks

Fix brush reset (missing notifier)

D2843 by @uvwxyz

CMake: use restrict w/ gcc, not clang

PyAPI: fast keyword parsing for bpy modules

No functional changes.

CMake: add -Wrestrict for GCC

Fix passing the same argument twice to BLI_strncpy

Fix setting the operator name in Py operator API

Fix incorrect CUDA remaining time estimate after previous commit.

Cycles: CUDA faster rendering of small tiles, using multiple samples like OpenCL.

The work size is still very conservative, and this doesn't help for progressive
refine. For that we will need to render multiple tiles at the same time. But this
should already help for denoising renders that require too much memory with big
tiles, and just generally soften the performance dropoff with small tiles.

Differential Revision: https://developer.blender.org/D2856

Fix use of uninitialized memory in Cycles normal baking.

Code refactor: zero render buffers outside of kernel.

This was originally done with the first sample in the kernel for better
performance, but it doesn't work anymore with atomics. Any benefit was
very minor anyway, too small to measure it seems.