Transferring uv’s is a surprisingly non-trivial task. It’s ok if you’re working with identical geometry, but any other circumstance it’s easy to get a tangled mess.
The uv transfer sop employs a variety of tricks under the hood (working per uv shell, carefully working with uv borders, measuring area), to give clean and resilient uv transfers.
The following gif shows a common use case; shapes that are similar (a high and low res pig), the low res mesh has no uv’s and needs them transferred from the high-res. You can see a default attrib transfer fails, but the uv transfer sop works successfully.
Determine which attribute represents uv’s.
Determines how agressive to fuse UVs.
Boder Fuse Tolerance
Determines how agressive to fuse UVs on the border points