Blender Git Loki

Merge branch 'master' into soc-2018-hair-shader

Week 10 merge: no issues

Mass cleanup!

Merge branch 'master' into soc-2018-hair-shader

Week 10 merge: corrected some clashes

Cleanup: code style fixes, tweak comments and variable naming.

Fix: melanin randomization to the linear quantity

Type qualifier typo

Ty nirved

Fix: apply Coat mod TO THE ROUGHNESS, not variance

Linearize melanin concentration

This commit includes factoring remappings into new functions, as well as
adjusted defaults for maintaining roughly the same brownish hair.
(In reality, Melanin 1.3 = New Melanin 0.8054375, so I truncated the
extra decimal places.)

Fix: Undercoat Roughness -> Coat

Fix: reorder variable initialization and usage

Fix: X Randomization -> Random X

Fix: set a default brown for Direct coloring

Fix: rename PrincipledHairBsdfNode's melanin stuff

Fix: lower_case OSL variables

Fix: remove random value from closure

Fix: hide Random value if unused

Cleanup

Fix: OSL shader used both the wrong and the unadjusted type of roughness

Merge branch 'master' into soc-2018-hair-shader

Week 9 merge: no issues

Lift upper bounds of roughness/radial roughness