Alexander Gavrilov
34ed58dcaf
NodeTree structures of materials and some other data blocks are effectively node group datablock objects that are contained inside the parent block. Thus, direct references to them are only valid while blender is running, and are lost on save. Fix Copy As New Driver to create a reference that goes through the owner datablock, by adding a new ID flag to mark private pseudo-datablocks. Also fix functions that return full paths to structures and properties, e.g. used in python tooltips. Functions for paths from ID to struct or property can't be changed because of Animation Data related code. Reviewers: mont29 Differential Revision: https://developer.blender.org/D5559