I don't think the problem is rendering but understanding. Your brain reads a cube, as eh, a cube. If I give you this [2,4,4,6]+ and tell you rzwitserloot that is a cube in the space. You can still imagine that.

So a 4D rendering is just more information in a 2D flat screen. Your brain can't process all of this information. So it "can't see it". But it is there.

+dunno if these coordinates translates to a cube or just some 2-3D object but I hope you get the point.