Blender Git Loki

Remove Stroke placement option

Reorganize stroke materials panel

The stroke style now has only solid or volumetric type and the texture and pattern have been moved as options shared by both styles.

Cleanup: Remove unused variables

WIP: Add volumetric while drawing

Cleanup: Remove unused line

WIP: Add geometry shader for volumetrics

UI: Hide stroke color if stroke style is texture

UI: Move additive drawing to animation tab

UI: Move Insert/Delete frames to animation tab

UI: Move Draw on back to brush panel

UI: Hide continuous drawing option in 3D view

UI: Move interpolate panel to animation

WIP: Basic stroke volumetric support

This need more work to expand volumetric features. Commit these changes to put in place all the pieces of the system.

We keep as is today while we decide the final design.

Fix error when play animation

If the same datablock was used, there was a crash. The frame change must be evaluated before other checks.

New stroke styles: Texture and Pattern

Changes in previous fix for T51942

The previous commit broken the stroke color update

Merge branch 'blender2.8' into greasepencil-object

Fix T51942: Color not updated in UI panel

When update the color in the panel, the color box was not updated after release control.

Merge branch 'blender2.8' into greasepencil-object

Fix T51936: Show draw strokes since first stroke

The drawing stroke must not be related to cache drawing because only one stroke is done at time.