The procedural stuff has to create triangles in the end because that's the only thing the video card can render.
There is a way to extract meshes from games, but as you might have guessed, it's fairly illegal to do it, and it's definitely illegal to use the results. :) It's called
3D Ripper DX. You run a game with this thing attached and press F12 to capture a frame. It comes with a Max plug-in which allows you to import the captured files. You have to know what FOV is used in the game, but it's easy to guess it in a few attempts (just try different settings until the meshes don't look distorted anymore; I think Spore uses 45 degrees). The tool will give you the meshes as they end up after the vertex shader runs, which means that if the object is animated, you'll see it as it is deformed by the animation (in other words, exactly as you see it in the game in that frame). Obviously, it can't show you the skeleton, bind pose or animation curves because each game implements those in its own way (and actually, Spore does them in a
really cool new way, since it must animate characters made by players). It can only extract the common denominator, i.e. the final geometry.
Here is an FBX of one of my creatures.