I've imported NASA Curiosity-MSL 3D model into Space Engine.
It looks nice, but of course (before you ask), it won't roll on mars. It will just be static where you put it, just looking handsome.
You'll certainly have to rotate it a bit with the editor (Shift-F2) to adjust it onto the surface.
It has been tested on 0.990.36.1665
Download it here
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