UV unwrap problem!

hi guys

having problems mapping materials ‘seamlessly’ to this model that i created in gravity sketch. i did a smart uv unwrap and this is what came out. there seems to be weird split lines and the the unwrap looks a bit messy. is there a way of cleaning the surfaces up in blender or is that something i have to rebuild in gravity sketch?

thisis the smart unwrap i did. i applied s geometric pattern to the red upper of the shoe, but it was deforming etc…not good.

I think you should do it manually.