shadows and highlights

could anybody tell me where cud i find dry pastel renderings of consumer products/automobiles. ones that are untouched by photoshop! i basically want to see some good shadow-surface relationship rendered in pastels and a single color (grey) marker.thanx guys.

some of the sketches on this site may be what you are looking for.

http://www.drawthrough.com/sketches/index.html

Wow that is an awesome site. One of those tutorials is very useful. Hey, one of the ways to get better even while in school, is to practice constantly!

Or atleast when you actually have the time to focus on your own studies. :stuck_out_tongue:

i think that these may be usefull too, especially those fourth and second from the bottom.
http://www.cardesignnews.com/studio/tutorials/index.php