Should I reconsider changing the number of row and columns overlap during export? That warning is worrying me that the results would be incorrect. I followed the tutorial you have provided and set 200 rows and columns overlap. Pardon me if I don’t properly understand this issue
the size of the overlap is always relative to the tile size and number. Please have a look here: SNAPHU Unwrapping
If the warning says the overlap is too little, give it a try with twice the size. But most importantly, visually check the result for errors. Does it make sense to you?