I may be misunderstanding something in Reality Capture’s implementation - but I’m very familiar with UDIM workflow.
UDIM tiles DO go over U 1.0 and V 1.0 in UV coordinate space.
Attached is an example cube I tried to import into my Reality Capture scene, with each of it’s faces on a different UV tile (UDIM’s 1001 to 1006) Is there something I’m missing? Or is importing a mesh with UV tiling not supported yet?