Gmax is a version of Max designed to allow gamers to make mods -- new models, maps, etc., for games. The way it works is that the end user, the gamer, can download it for free. Software companies can pay for a developer's version, which lets them essentially develop a plugin (called a gamepack) that will allow you to export from Gmax in that game's model format. For example, Microsoft Flight Simulator 2002 Pro comes with the gamepack for Gmax, allowing end users to design and build their own aircraft in Gmax, and then export them for use in the game. I don't think Discreet will allow any plugins that export to obj or dxf or 3ds or anything like that, because then users essentially will have Max for free :-)