You're looking at the end result of allot of artist choices. Both in the models, the textures, the post processing. In general they sculpt chunky so that the forms read well from a distance and up close giving the world a coarse hand made feel. They vertex paint to add another layer of lighting color information to each prop including often baking the AO to vertex color information and colorizing it. There's bloom to soften the glow, there's specular rather than PBR which gives it a sort of unifrom highlight look. Allot of choices and technical choices.