Grouping Rollup

Grouping currently is placeholder and it’s only suitable to store Selection Sets. If you are using UVReactor (means that UV Reactor is open, it updates the underlying data structure after each modification, so all of the faces inside a UV Shell will use the same ID, even if you are modifying the toplogy of the geometry or the UV.

Note: the update choses the most frequent ID in a UV Shell and it will change all the rest of the IDs to that one.