the only time we are seeing in 3d is when we are looking at an edge were they diverge from each other now we can see in a 1d perspective but its rare normally
I HAVE STUDIED ALL 4 DIMENSIONS; AND I CAME TO THE CONCLUSION WE ARE 3RD-DIMENSIONAL BEINGS IN THE 2ND DIMENSION SINCE WE PRECIEVE ITEMS IN 2D EXAMPLE A SPHERE YOU SEE IT AS A CIRCLE WHICH IS YOU GUESSED IT 2 DIMENSIONAL ANY ITEM YOU SEE YOU SEE A FACE BUT NOT THE BACK OR THE SIDES WHICH IS JUST LIKE SEEING A IN 2D DIMENSION