I need to mirror a surface to get it symmetric.
To do this, I have made the surface a little larger than it needs to be to have something to trim from.
My problem is that I can’t get Rhino to split, trim or anything else on this surface (made with patch, from outline curves).
I have also tried to matchsrf, without trimming the surface down the middle plane. This dosn’t work either.
What am I doing wrong?
How do I best mirror the surface?