Blender Git Loki

Remove redundant file exists checks

Fix T47303: Voxel texture disappears after first frame

Failed reads didn't update the voxel 'ok' tag,
making successive reads fail (even on existing frames).

Recent BLI_rename fix introduced error w/ blend file versioning

Rename calls didn't check if the file existed first, so missing file was counted as success and ignored.

Include why file operations fail in reports

Fix BLI_rename returned success w/ missing source path

Fix T47249: Wrong edit-mesh material color w/ hidden faces

Regression in 700c40e2

Also avoid unnecessary flushes with material changes with hidden faces.

Cleanup: correct comment, unused var

Fix T47300: SHIFT TAB, CTRL SHIFT TAB shortcuts does not toggle snap, snap mode on off anymore.

Regression from rB12c71508c2d7.

Now, we systematically first try keycode from `XLookupKeysym()`, and only fall back to
the one from `XLookupString()` if it failed to convert to a valid gkey.

Usual i18n/UI message fixes...

Cycles: Cleanup and reference actual paper used for BSSRDF sampling

Fix T46933: Bone axes letters may not be visible

Now axis letters are view aligned.

Fix T46583: Sculpt symmetry don't work in clipping border view mode

This is an attempt to solve the issue by doing clip test on the original
side of the stroke. Some extra testing is required.

Fix T46411: Experimental deps graph causes particles to jump around

Depsgraph: Fix particle system component nodes not being displayed in debug graph

Fix T46382: Crash sharing particle system with clump or rough curves

Made those curves local to thread evaluation now, so there is no
threading conflict accessing them from evaluation threads anymore.

Fix T46481: Volume grid particles out of volume

The issue was caused by fix for 31017 which resulted in some
missing intersecitons recorded which screwed inner/outer checks.

This is an old bug, so didn't bother with forcing re-distribution
to happen on file open to avoid possible other regressions.

Fix T47207: Material shading incorrectly handles colorramp node

The issue was introduced by a fix for T44713 which only made GLSL
consistent with Cycles.

Now we do have conditional averaging or proper luma weighting based
on whether we're new old old shading system. Not totally ideal but
should work for until we re-design viewport possibly breaking how
Blender Internal does implicit conversion.

Cleanup: rename uvflag -> flag for dm drawing

Was called both, however this isn't mainly for uv's so just call 'flag'.
Also remove redundant NULL check.

Partial Fix T47221: Sculpt Hide fails w/ texture drawing

Support for skipping hidden faces in sculpt mode w/ texture drawing.

UI: update dynamic tips

Useful for progress ETA to continuously update.

This adds API option not to activate new regions GL state which isn't needed in many cases.