If you want to export your gmax files, gmax only allows P3D files for exporting. There are no converters for this file format. So what if you are learning 3D modeling or animation on gmax, and want to use the pro version 3ds Max? (It used to be called 3D Studio Max.) All your work, at least your 3D meshes, can be exported to 3ds Max, or any 3D modeling software program that accepts the OBJ file format, like Blender 3D.
There are some maxscripts available on the internet that can be run in gmax. We have one you can download below. In the video tutorial, we show you how to export gmax objects into an OBJ file. Then it is easy to import the OBJ file into 3ds Max, which already has an OBJ importer.
Run the gmax2obj file using gmax maxscript . It will read all the point coordinates of the object, which is then printed in the maxscript Listener window. It is just a matter of copy and paste into a TXT file. Then save as an OBJ file.
Example : MGobject.txt becomes Mgobject.obj
One problem when selecting the co-ordinates from the Listener window, is that in order to copy all of the text, you must hold down both left and right mouse buttons while you continue to group select everything. Gmax Listener has a memory limit on how much text can be selected, but using the hold down left/right mouse buttons solves this problem. So, just keep that in mind when you try it. It can be tricky.
Gmax to OBJ converter
Download and unzip this file, then cut and paste it to your gmax/scripts folder.
Watch the Video