The source image is a black and white illustration done by Dugald Stewart Walker in 1914 for a book of fairy tales by Hans Christian Anderson. (Colorized using my universal colorizer style template.)
Dream Level: is increased each time when you "Go Deeper" into the dream. Each new level is harder to achieve and
takes more iterations than the one before.
Rare Deep Dream: is any dream which went deeper than level 6.
Deep Dream
You cannot go deeper into someone else's dream. You must create your own.
Deep Dream
Currently going deeper is available only for Deep Dreams.