I was really happy with how my alien head sculpt turned out, so I decided to create a few posters with the same model.
I exported renders of the alien head, planet, and UFO in Blender to use as a base. Everything else was done in Clip Studio Paint.
For anyone interested, individual prints of each are available at the following links.
"Variant 01"
https://www.artstation.com/prints/art_poster/yA7q/alien-portrait-variant-01#art_poster_size_12x18
"Variant 02"
https://www.artstation.com/prints/art_poster/DB5X/alien-portrait-variant-02#art_poster_size_12x18
"Variant 03"
https://www.artstation.com/prints/art_poster/gkaQ/alien-portrait-variant-03#art_poster_size_12x18