How convert file with extension *.3d to *.obj

Question

I have one file with extension .3d. How to convert it to .obj?

Answer 1

If it's a unsupported format by 3dsmax then you need a importer plugin or script to import the *.3d file. To export it you just export as *.obj either manually or automated by script.

You can look into other free software and see if it supports the format you need.

Blender: http://blender.org/

Meshlab: http://meshlab.sourceforge.net/