See how shadow in which the bird on the left is located causes us to see his white feathers as dark
to middle value?
See how the directional changes of each bird's edges indicate their gestures?
See how shadow softens textures whereas light reveals them on both
birds?
We fall into the "image trap" when our focus of attention is on the image itself rather than what makes it appear the way it does. Believe it or not, that substance is made of our visual elements: shape, value, color, texture, direction, line and size. They are our mode of visual
communication!