I let the story of Martian Debut drive the design of the Martians. I knew that I wanted them to slip and swim through the air and their primary feature would be an unusual-looking eye.

Early sketches were inspired by H.P. Lovecraft creatures. They were too gross. Too many eyes. I settled into a more geometric eye design, because it gave the Martian a mask-like face that felt alien and unreadable.  I also moved away from a tentacle-based anatomy for something that felt more etherial, with wispy tendrils that would flow around a snake-like body.