I love this first iteration of a photogrammetry solution within Substance Sampler. Especially the auto masking is bonkers. One thing i do miss however is the ability to create more than one UV Tile. Auto UV Unwrap in Painter can handle UDIMs. Designer can bake to UDIMs. So it stands to reason, that Sampler should be able to create those as well, should it not? I can see how a single 4K map might be enough for smaller objects, but having done quite a bit of photogrammetry in the last few years, mainly using Reality Capture, I would have a really hard time wit most of the objects I deal with, if I only had one 4K map.
Hope this feature will find it's way into later versions of Sampler.