I'm guessing that was an imp using the AoW textures. I'm sure Nilbog knows, but using the /become command to change someones illusions has multiple values, one of which changes the skin of the model (see: AoW vs Statue of RZ...a single number change will alter which illusion the person is turned into.
But, RZ did have back ornamentations:
[You must be logged in to view images. Log in or Register.]
AFAIK a good number of the POP gods were outsourced for their art.