UV Unwrap is a great way of getting automatic UVs on your models, but tends to generate a lot of small disconnected islands in the process.
This SOP aims to combat those small islands, and iteratively merge them back up to the closest largest neighboring island.
UV attribute to operate on
Initial Fuse Dist
There is a built in intial Fuse Node to ensure good island connectivity, this is the distance threshold for that operation.
Size threshold of the islands that will be merged back into larger pieces
Method for reflattening the islands based on the new seams
Attempts at merging the islands together. Higher values produce smoother results
Optimize UV Border
Attempts to cleanup triangles that are sticking to the side of the UV island. May cause small islands to reappear