[GRASS-user] How to convert 3D DXF file to VTK

Dear all,

I tried to convert DXF file which contains 3D line, polyline, face
etc. But I get a flat geometry. When I check the coordinates in VTK
file they are wrong. How can I correctly convert DXF to VTK.

Any hint would be greatly appreciated.

I have attached both DXF and VTK files.

Thank you.
Hom Nath