Space Whale Castle

This one was both fun and challenging. There's a bunch stuff going on and a bunch different perspectives in one image and a lot of rooms viewable from different angles.

The client asked me to draw a space whale with a castle on it's back for his D&D campaign. Also, to rephrase just a bit, I was asked to draw this in a way that would resemble M. C. Escher if he was really into Lovecraftian horror.