Doom references/coincidences in creative works before Doom

I was watching this demoscene demo from 1993, where I couldn't help but notice how similar this artwork is to an imp. It doesn't help the fact that the demo happens to have satanic themes, so it gets more relevant to Doom.
It could be a coincidence as this demo was released a month earlier than Doom official release, but maybe the author had tried the alpha versions or something and was inspired by them.