When I bake two joined curve (one curve and one offset) to make a frame, when I bake it there appear
an internal surface that is attached to the frame, which is not supposed
to be there. This surfave I suppose that is coming from the offset one. ??
Can somebody tell me how to prevent/ suppress this surface that is appearing.
when you run the _Sketch (On Surface) command on your faces, you'll see that it refuses to sketch on the inside. Also the _What command tells you it's a single surface with 1 hole(s). So the topology is actually correct, it's just the mesh that is at fault. It would seem that Grasshopper makes a correct mesh while Rhino makes a wrong one.
In the Rhino object properties dock-bar, you can override per object meshing settings. Try these:
Also don't forget to post a bug about this on the Rhino forum. It carries more weight when a customer complains than when I do.