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Offset surface of a complex geometry

Question asked by Mike Tree on Jun 22, 2014
Latest reply on Jul 10, 2014 by Chris Dordoni

The attached part is representative of the blood volume within major vessels in the body. I am attempting to offset each of these surfaces by 1 mm, and then delete the blood volume, to re-create the actual vessel. I started with an imported .stl and used ScanTo3D to create the surfaces. I then filled the ends of the surface to create the current solid body. I hoped to shell outward, but it throws an error and highlights the faces unable to shell. So, I took the remaining faces and tried to offset the surfaces. I hoped I could offset most of the outer surface and then simply fill in the holes. However, that didn't work. I can offset some of the faces by selecting them one-by-one, but this is a VERY tedious process. Anyone have any suggestions?