I think the grouping tool puts the data in the CR2, so it is not available to use in UVMapper? Whatever you did with the grouping tool can be done in UVMapper and then get all the information in the geometry. I think what you want to do is, take the P4 geometry out of Geometries and open it in UVM. Save the remap back to the same Geometries location with a different name. Open a P4 Cr2 ina text editor - FIND - (I forget P4 name) - Replace with ( your new name ) You do not even need to include ".obj" just the name before this. everything else is identical. The main use I find for the grouping tool is reversing normals when RDS has addlepated them. I don't know what normals tools are in UVM.