Effective architectural visualization (commercial or residential objects) needs additional elements which help to demonstrate relevant dimensions and proportions, and which "add life" to the design. DOSCH 2D Viz-Images: Future Vehicles
offers such elements.
Each high-resolution picture comes with the matching alpha-channel, which allows for the quick and straightforward use in most CAD-, 3D-design and image processing software programs.
All images are available in the widespread format: Photoshop PSD