Photography
Try not to take pictures with lots of clutter in the background. If your taking pictures in your work area clean off an area so the clutter doesnt detract from the model.
For final photography of a finished product try to take pictures in a "white room" where the background is just white, appears to be an endless room. Also, taking pictures outside can give the appearence of a real car.
Clarity tips:
If buying a camera get a digital camera with at leat 2.0 Megapix (MP) and make sure it has MACRO. Macro is a must, with out it the close up pics will be blurred.
Make sure Macro is on when taking pictures within 2 feet. If its not on pictures can be blurry.