Taking another look at these things:
These are actually just short of finished.
The models are actually very detailed and have a high polygon count. Look at the closeup of the dragon's teeth, snout and jaw, and the detail on the horns.
The bump textures are there too, those are the bumps on the skin.
The problem is that the skin map was left blank, so that's why you see large areas of yellow, puce, orange, etc. instead of actual scales and other detail that should be wrapped around each surface.
Here's a page with a skin map for a human head, for example
What we're seeing should be for a preview rendering, which is done quickly to show how well the parts are coming together, adjust camera angles, lighting, figure positioning etc.
I'm theorizing that the skin map artist may have not gotten their work done in time, or they ran out of time to do a full rendering.