How a 4th Dimensional Being Sees Us

It is possible to project three dimensions onto two. Every painting, photography, movie... does that. The math is understood. It can be applied to four dimensional objects, to project an image into three (or two, for our computer screens).

So math is pretty "together" when it comes to multiple dimensions.
I got is the 2 dimensional being I have issues with... anything in that plane would only see a line... conjecture as to what a 4th or 5th dimension sees or what our objects would look like in the other dimensions makes no sense.

Seems it is still if there are other dimensions...

But I am thick