redTransit Posted June 7, 2016 Share Posted June 7, 2016 I need to draw a circle, then drape it on a Civil 3D surface (ie turn it into a 3DPoly perhaps?), and then find all points on the circle that has a specific elevation. Does anyone have any ideas on this? I know I'm a bit late to this conversation, but here's another app that will do what you're looking for and is much cheaper, and more accurate. This uses the actual surface triangles of the surface to draw the 3D poly on the surface - each vertice will be exactly on edges of surface triangles and come out with the exact grade. https://apps.autodesk.com/CIV3D/en/Detail/Index?id=2057729428341833081&appLang=en&os=Win32_64 Quote Link to comment Share on other sites More sharing options...
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