@SheriGR It does appear that some mod has been used.
What I wanted to do was give game-generated aliens a makeover to be red "Martians". (I like to makeover my npc/townies so they are not wearing all the random nonsense they generate with). I had already done a series of pale aliens (to look like they were all in some kind of cult when in disguise), and I also did a series of stereotypical green aliens, and was hoping I could do some red "Martians".
I suppose I could make some from scratch using the red gallery alien as a base.