This is fascinating! I remember reading that most optical illusions don't work on people raised in remote tribes in the Amazon, as their visual perception has

This is fascinating! I remember reading that most optical illusions don't work on people raised in remote tribes in the Amazon, as their visual perception has been 'fine-tuned' for jungle contours, instead of the straight lines in the west. Is it possible that we _learn_ how to perceive line drawings in our early years?