Dreams don't have CGs.
The reason is because the Dreams were originally rewards given to Council Tier Patrons. They give us a prompt of a scene they would like to see and our lead writer at the time would write up the prompt free of charge to us.
After she was unable to continue writing that tier reward went with her. We did not continue it was it would cost time and money for these scenes.
However, I have said if anyone wants to make or commission an artist to draw the dream scene then I'll add it into the game as long as the artist adds his credits into the image.