I was wondering if there is a place where one could get some already built cars or objects and such for compositing practice? I thought I was reading a thread a while back of a scene someone had designed in 3d and did a matte painting for but then brought in a stock 3d car to put in their scene without having to sit and model it. Any websites or anything to get this kind of stuff? Thanks
Here's a few http://www.3d02.com/ http://www.squir.com/ http://www.doschdesign.com http://www.deespona.com/ http://www.turbosquid.com/ The top 4 have better than average models. There are a lot more sites but I found these to be the best. Turbosquid is massive and the models are hit and miss. Look carefully before you buy. I can't say that I ever got a model that was prefect from any place. Sometimes they need to fixed or reworked a bit.
Here's another one http://www.3dvalley.com/phplinks/index.php?PHPSESSID=691fade19fb809f46200a0afef6a7bc7&PID=12 It a long list of links to 3D model sites.