Hi,
I have no idea how to extrude a surface along/on a surface, which is not a plane. Who could give me a clue, if I can make any sense?
I tried one, but all i can do is followed one simple direction, not what i want. Still a gap between my extruding and the shape.
![](https://storage.ning.com/topology/rest/1.0/file/get/2870736742?profile=RESIZE_710x)
many thx
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