I am going to have to disagree with you guys that think the grills are not in relief...
Those 3D scans done by Steven D. and his crew for the MR build are not all that detailed, I mean just look at them, they are missing details all over the place that you can clearly see on the studio model and are definitely larger than "one ten-thousandth of an inch", also all of the corners have been rounded off and all the details look 'mushy'...so that reference can not be used to determine much of anything.
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(I actually do see a little bit of the detail relief on the engine grills on that 3D scan)
...And I'm just going to leave this here...
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