Recently my father aquired Cinema 4d CE6. Are there any exporters/converters that will turn models created in it into .MDX files that work in-game? It seems to have most of the features of 3DS Max, so I was just wondering.
I doubt there are any MDX/MDL exporters for Cinema 4D. However, if Cinema 4D can export to .3DS (which most modeling packages can), you could then import a model in 3dsmax or gmax (which is free) and export it from there.