[Niray]

Regarding you post in C-class 2007 topic about rendering tutorials;
(If you're using Vray)
Here are some tutorials that will help you:

3DM free video tutorials for digital artists, Largest world Challenges, FREE 3D MODELS, Award Gallery
Aversis Vray Tutorial - HDRI in Vray | 3D tutorials for V-ray (3D Studio Max), Rhinoceros 3D and Adobe Photoshop
Aversis Vray Tutorial - Studio lighting in Vray (1)| 3D tutorials for V-ray (3D Studio Max), Rhinoceros 3D and Adobe Photoshop
3DM free video tutorials for digital artists, Largest world Challenges, FREE 3D MODELS, Award Gallery

and some shaders:

evermotion:rendering:vray car-paint

Good luck with rendering, keep us updated.