Joining surfaces
I have the following test object that I'd like to use "extrude along path" on made of 2 circles I've cut in half, and a polyline. To use the extrude function, I need it as a single surface. How do I combine these into a single surface please?
"Surface->Combine" tells me the surfaces must be part of the same object.
If I use "object -> merge" to combine them then try to combine the surfaces again, it tells me that "all surfaces must be adjacent (with verticies shared between surfaces)."
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