I tried UDIM export. It is okay, but I still need to manually rename all texture to load as UDIM.
I thought if I could rename the material Std_Skin_Head to 1001 and so on, it automatically rename while exporting, but the Rename button is grey-out.
And also, currently, the texture is placed in corresponding body parts folder, I also need to manually move them so the same type of maps are in one folder.
Is there anyone who use UDIM workflow smoothly ??