Here's a Sky Castle for the Gnomon Workshop Art Forum, which was the theme for the month of April. I have the start of a plot for it, some of which I didn't have time to add into the painting. Hopefully part of it is evident. A djinn is forced into service by a sorcerer to push and hold a castle in the sky to protect the citizens from enemies below. From a pencil sketch, drew buildings in Illustrator, using the 3D filter for some of the basic shapes, then composited everything in Photoshop and painted over.