Auto-Retopologize/Remesh geometry based on color/id map texture?

[Tachtian]

just saw this topic popping up and draw a connection:

(Pseudo-) subdivision limited to vertex group

As of today, the subdivision surface modifier does not support vertex groups; i.e., the modifier is always applied to the whole object. There may be situations, however, where one would like to work with the subdivision workflow on parts of a mesh and leave the rest of is as is. One such case could be meshes with a lot of polygons resulting from a boolean workflow. The following technique allows just this by using a bevel modifier and a smooth modifier applied to the same vertex group. [pseud…

Is that useful?