origin model property seems not to be used the same way in collision
detection and model drawing. The simple exemple below shows that when
a position device has an origin diferent from [0 0 0], its collision
doesn't match the one of rectangles in the gui.
A short demo means more than long explanations : just try to make the
green block collid with the blue by launching playerv.
I tried to find where the origin is used in rectangles drawing and
collision detection but it's beyond my stage-skills...