Blender Git Loki

Comment out SVM fresnel_conductor() function for now, still unused.

Cycles / OSL: Add a conductive fresnel shader template.

This adds a fresnel conductive OSL preset to the Text Editor. Based on a patch by Lukas Stockner.
Differential revision: https://developer.blender.org/D145

See the differential for details.

Several tweaks for Quick Smoke:

* Improved Cycles fire, patch by Gottfried Hofmann. Differential revision: https://developer.blender.org/D777

* Added Smoke + Fire type to the operator too.

* Cleanup.

Update readme for Blender 2.72.

Fix T41737 using append from menu will result in error message

message in terminal was: RNA_boolean_get: WM_OT_append.relative_path not found.
Added check for existence of the relative path property which was removed from append
since it is not needed and used.

Some updates for Quick Smoke / Cycles.

* Add Density multiplier.
* Use Smoke color attribute.

Patch by Gottfried Hofmann, with some small tweaks by myself.
Differential revision: https://developer.blender.org/D776

Fix for line style shader nodes also shown in the Add menu of other shader types.

Problem report by Nahuel Belich through Facebook, thanks!

Fix T41740: Different behaviour of custom hotkey

Quick fix, this is actually a demonstration of why we should use modal keymaps!
We can give any event to *start* the op, but then hard-code how to *end* it... tsk.

Fix T41419: Quick Smoke doesn´t work with Cycles

Now the Quick Smoke operator creates a basic node setup for smoke and fire. This could be made more fancy still, but that's for later. :)

No need for try/except in D766

Cycles: Several fixes for Presets.

* Fix caustic properties, was not updated.
* Remove wrong items, leftovers from panel splitting.
* Add missing items. Even if the bundled presets do not set those, a user expects that all properties inside the panel are taken into account, when adding a new preset.

Cycles: Fix Caustic tooltips.

Now that the option has been reversed, the tooltips should be changed too.
Thanks to David Black, for bringing this up!

Fix T40507: Blender Internal Render's Gather don't use node's emit color.

Node was simply ignored by occ shading (noted as TODO), though it's a mere matter
of a very few lines of code, nowadays... Just copied from similar task in bake code.

Py Mathutils: add `invert_safe()` and `inverted_safe()` to `Matrix`.

Those two mimic our BLI invert_m4_m4_safe - they add a small offset to diagonal values,
in case org matrix is degenerated, and if still non-invertible, return identity matrix.

Org patch by me, final enhanced version by ideasman42, many thanks!

Fix T41709: Bump not rendered correctly behind transparency using Branched Path Tracing

Cycles: Workaround cuda 6.5 compiler bug with sm_50

Fix T41730: Knife Cut fails on concave faces

Knife: remove redundant allocations

Cycles: Fix for the BSDF evaluation init

Math Lib: Add copy_m2_m2, unit_m2, zero_m2