What's the best way to create a 2D map out of a 3D model?

Not sure what kind of code you’re dealing with, but I expect Matlab (not free) could do this… their graphics are kind of crappy, though. R (free) has better graphics, but is more persnickety to work with where graphics are concerned.

Can you tell us more about the 3D model?

I’m currently doing the complete opposite on Google Sketch-up since I just worked out how to use the 3D functions. If you look at the 3D model from bird’s eye view, you’ll see a 2D model. I’m assuming you want something that looks sort of like a floor plan, right?

@dxs I was going to suggest sketchup also… if you can get your 3D model into sketchup then you can collapse to a flat plan.