Using Substance Painter
Substance Painter 2020.2.0 (6.2.0) introduces the new UV Tile workflow letting you paint across UDIMs, which is a great benefit to Character Creator users. In response, a Substance Painter preset is developed for users to easily transfer Character Creator characters with compatible format between the two engines. Before Character Creator version 3.31, you can export a fully-dressed character and its accessories to Substance Painter, however, you cannot benefit from the new "painting across UDIMs" feature because of the file format compatibility issues. From version 3.31, Character Creator supports exporting file format specifically for Substance Painter, so you are allowed to paint across UV tiles.