The primordial is not naturalistic, it's symbolic. Backgrounds do not imitate nature, they're stages for dream dramas, arranged by the artists specifically to accent the action of the piece and to suggest the sense f primordial landscape.
But there are also certain painting/drawing techniques that contribute strongly to the primordial look of these works. Just a quick rundown - I plan to go into greater detail in future installments:
No detailing - things are rendered as simple bold forms broken down into light and dark shapes which are then painted in swirling colors that suggest a thick soupy atmosphere.
I'm nearly finished with the digital painting I call Bemused (probably to be called Red Fish or Devilfish on completion), and yesterday morning when walking out of my bedroom (still the storage room) I knocked over a pile of books and Frazetta prints (old calendar/book pages glued to cardboard in the Let's Start a Framing/Mounting Business days). In picking them up I got a quick look at a bunch of his work, and was really struck by just how abstract and primordial they are, which my work is not AT ALL!!
and the characters enjoy a wide range of facial expressions and social conventions. These are definitely not primitive humans facing naked Nature with only /courage and Will - they're upper class citizens moving through their social melieu