The Deus Ex environment looks cool! One thing you could do to improve it is to make the yellow part feel more like metal. Instead of putting a yellow shade in your diffuse map, put it in your specular. Also, make it more reflective, like it is in the concept. Remember, the more reflective you want it to look, the darker…
This pretty cool man. What's going on with the spec though? It looks not really present at all. Afaik the paint/finish on those things is reflective enough to pretty much totally knock out the diffuse color under bright light.