how can I convert 3d max pdf files to 3d autocad file and open them in 3d autocad

3d autocad modeling

2 Answers

you cant convert a 2d pdf version to any sort of 3d outcome. can only be done tracing it to your well known design as a new 3d.

To open the same 3dmax file to autocad 3d, follow this;
Convert the 3dmax file to .fbx/.obj/.stl
Trust me it works.

You cannot. Only PDF conversion I am aware of is 2D PDF to DWG/DXF or to SVG using inkscape or similar. If you get the native 3D Max file, than you could convert.