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AutoCAD quilt(?) surface has no thickness in INVENTOR

AutoCAD quilt(?) surface has no thickness in INVENTOR

I have a 3D dxf file of a deformed shape geodesic structure.  The elements used to define the deformed shape are triangle shaped.  I have imported this DXF file (attached) into AUTOCAD and placed a surface onto it (quilted surface I think).

Now, I need to take that surfaced model and combine that with an INVENTOR 3D model to check for interference fit.   The problem is that when I import it into AUTOCAD INVENTOR, it requires a "thickness" to the surface to be really 3D.  INVENTOR does not permit me to enter a thickness - I beleive that the surface is not "continous" may be the source of the problem.

Anyone ever try this before and found how to get the surface into INVENTOR as a surface that I can work with ?



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