The Hylden, moderator of the Eidos forums, made an amazing texture overhaul of Defiance, adding additional details to characters/environments/particles. Below are few examples of his awesome work. You can download the texture packs by clicking the link above (just scroll down for the download links).
The pack includes new textures for Kain, Raziel, Janos, Moebius, Turel, prisoners and Sarafan Warriors. It also enhances several environmental textures in the Sarafan Stronghold, Reaver particle effects and spells, Earth Reaver platforms and jump and bat beacons.