Toolbag does not currently support UDIM baking, however, there is a workaround: * For each UDIM, apply a unique material. Name the material the same as the UDIM region, ie: 1001, 1002, 1003 * Make a copy of the low poly mesh in your 3D software, for each UDIM offset the UVs so they are in the 0-1 range (Toolbag will not…