Perception changed with photography, and we came to interpret blur, lines and other devices as indicating motion.
Muybridge
An illustrated timeline and overview of how the human visual environment, and perception of it, has changed from ancient times to virtual reality.
What to our ancestors would have been blurred and defective images are now accepted as depicting motion. How our perception has changed, thanks to photography.
The evolution of his paintings of ballet dancers, and a look at some themes of his paintings of individual dancers and small groups.
A succinct summary of the biography of Degas, told with the aid of 12 of his key works, from history painting to the late landscapes.
Their working methods could hardly have been more different, but they shared a common interest.
I have several times written that early western painting, until the late Renaissance, not uncommonly incorporated multiple copies […]
The Eclectic Light Company 