If you want a quick and kind of neat insight into your visual brain, find a photo of a face and try to draw it by eye (without tracing or measuring). Then turn

If you want a quick and kind of neat insight into your visual brain, find a photo of a face and try to draw it by eye (without tracing or measuring). Then turn it upside down and try again. There's a whole bunch of image processing steps your brain turns off when you aren't recognizably looking at an object you know (especially a human face), and most untrained people will find they can draw a human face much better upside down.