UFO design

[Calx]

The original 3D render is just arched back into the air if that creates that illusion, but I tried to get it as accurate as I could, The shadow should be a lot shorter in vertical length for that reason of him arching his chest into the air, but the UFO doesn't have to hover at a parallel angle to the ground. I'm sure they tilt in the air a bit kind of like helicopters do. I don't see anything odd about the perspective, but maybe someone else will catch a flaw in the image now that you mentioned it.

I would release the PSD, but i'd have to take the 3D character out since it is a paid stockphoto image by copyright.

You can fix that by changing the light to hit the ground at an angle, although it might a bit awkward.