UDIM Grid

This is a UDIM grid you could use for any purpose.
I made this to use it in blender to export UDIMs.

To do so, simply import this to the UV image editor, and setup the islands the way you desire based on this grid. Treat this as a real UDIM grid, more or less. Once you're done, position the 2D cursor at the 0,0 location, set the 2D cursor as the pivot point, then scale by 10. After that, you can export to any format you choose, such as FBX or OBJ

This should be useful until we get actual support for UDIMs.