A little tip for friends. I know that most prefer to model their own 3D car, but there is a huge collection of different cars especially until the 80's. I would like to have a life to put them all in the GP4, but I think I already have enough stuff to do LOL. In any case anyone who wants to take a risk, it provides the file in COLLADA(.dae) it is importable in blender and so the path to GP4 is a matter of hundreds of clicks.
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3dwarehouse.sketchup.com]