"The Citadel was protected by the Guardians, massive compared to a human, which the ancients considered to be minor deities sent by the Great God to guard their water supply. They were feared and worshiped by the Citadel Monks of The Oasis."
The God Robots (later renamed Guardians) are based on a number of
influences, mostly ancient statues of Greek, Roman, African and Oceanic
origin. And of course my general love for giant robots started at a
young age with Goldorak (the french version of the Japanese robot
Grendizer by Go Nagai) The first in the set was specifically inspired by
Ray Harryhausen and a statue that sits in the De Young Museum in San
Francisco. The robot was fully modeled in 3dsmax, but since it was only
going to show up in a couple of paintings in the book, all its texturing
was done in 2d to save time. Later on, it ended up appearing in far
more paintings than planned, so in hindsight doing a full 3d paint job
would have probably been the better course. Ah well.