The circle mash was projected onto the object using the "shrinkwrap" modifier. Now I want to extrude it upwards to get an object that sits on top of the underlying structure. The same worked with a plane, as you can see on the right side of the picture. But with a circle, I have no N-Gon that I can extrude. Is it just not possible or how would a workaround look like? Thanks for your help!