Material_Tools_Debug_Materials_Set_UDIM_Tile - Diffeomorphic/import_daz GitHub Wiki
Set UDIM Tile
The Merge Geograft tool now automatically selects the right tile for geograft UVs, so this tool is somewhat obsolete.
Before we make UDIM materials we must ensure that the geograft UV coordinates are located on the right UV tile. The nipple and genitals UVs are located on tile 1001, but the torso is on tile 1002.

Press Set UDIM Tile to fix this problem. In the dialog we specify which materials should be moved (the nipple and genitals materials), and to which tile to move them (1002).

All geograft UVs are now located on tile 1002, just as the torso is.

If you don't intend to combine the body materials into a single UDIM material, there is no need to move the geograft UVs to a specific tile, since textures are set to repeat by default. On the other hand, moving the UVs to the right tile never hurts.