Our 3D CAD supplier models have been moved to 3Dfindit.com, the new visual search engine for 3D CAD, CAE & BIM models.
You can log in there with your existing account of this site.
The content remains free of charge.
Once when you upload files and renders/photos of your 3D model on PARTcloud.net, simply go to the render/photo you would like to have as a privew and click on an "Image" icon (upper right corner).