Yes... CG Trader and Daz 3D allow for renders of 3D models as stock. Check the license if you buy from anywhere else, I know TurboSquid don't allow that. Check the license on Element... last I heard you couldn't use renders from it for stock. If you don't have any other 3D software you'll at least have C4D Lite in After Effects... Blender is free and Daz 3D is also free, which does some pretty good renders with their iRay plugin. Have been trying it out recently.