How can you use M3G files in MIDP applications? First, you need a M3G file that has some kind of 3D model. Make a quick search with Google or use any of the files that come with Wireless Toolkit 2.2 (in the Demo3D directory). In this article, we'll be using a heavily modified (simplified) version of the Sun's Pogoroo example. We don't want to make it move or do anything fancy; we just want to see the objects on the screen.