The triangularisation of the delta values doesn't take into account areas outside of the main UV "mesh".
There is the risk of picking a delta=0,0,0 if the target UV chooses values outside of the filled area.
Forcing to add the 4 corners of the map should be sufficient to cover everything properly.
The triangularisation of the delta values doesn't take into account areas outside of the main UV "mesh".
There is the risk of picking a delta=0,0,0 if the target UV chooses values outside of the filled area.
Forcing to add the 4 corners of the map should be sufficient to cover everything properly.