The outstretched foot is what I'm looking at, the angle is highly unnatural. I suspect it was done to be intentionally obscure, but the outstretched foot, to me, from this horrible gif rendering, appears larger and smaller based on the clockwise rotation (indicating closer/further from the pov).

But the images depth appears to be compressed, you get this effect in photography by standing very far back and using a high zoom lens. The difference between near/far is smaller by comparison to the distance to the focal point, giving the illusion that things are more 2D. There's still hints you can look at, but the effect makes the differences between near and far, much smaller and harder to pick out.