IDMapper has been ported to Blender 3.3 beta
That may sound a bit premature, but I am confident no changes will be needed for the official release of Blender 3.3. However, if necessary we update the add-on again of course.
Note that this version will not run on older versions of Blender.
IDMapper simplifies creation and editing of vertex color layers that can be used as ID-maps in texturing software like Substance Painter or Quixel.
It aims to reduce the time it takes to create an ID-map significantly, especially for complex hard surface models.
It uses powerful heuristics to create an ID-map from scratch and lets you interactively adjust the results. It offers options to use existing information, like uv-seams, but can also intelligently assign the same color to similar mesh parts.