Patch fail split/trim

Hi everyone, i’m trying to trim or split a surface made with Patch, but im moment i do it, the surface turns weird just like the picture. Someone can told me how to fix it.




Hi Mauricio - my guess is the trimming curve there is a little messy - possibly it has a small loop in it, something like that - can you post the curve and surface?


Hi Pascal

Thank i had check the line out, actually the line got 2 intersection points it was that.

Thanks a lot