@tinyroofnail In a less poetic way, the interplay of light and shadow on complicated natural 3D shapes is a fundamental stimulus of our visual system. I have a friend who asserts that physical books are more satisfying to read because the whole visual system has something to latch onto, tiny shadows and textures that just aren’t there on most displays. A logical corollary is that big, natural visual displays stimulate large sections of the brain.