https://forums.autodesk.com/t5/fusion-design-validate-document/how-do-i-make-3d-curves-for-sweeps/m-p/5554315#M300047 <P>I believe the reason you still need to select a plane for a 3d geometry, is it wants you to define which component coordinate system (CS) you want the geometry in (the active component CS will appear by default to select, but if so wanted to can make other component CS systems visible to select and hence be defined into). &nbsp;</P><P>Jesse</P> Tue, 24 Mar 2015 06:00:15 GMT Anonymous 2015-03-24T06:00:15Z