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. For outside scenes trees & plants are particularly suited to accomplish this.
Instead of using 3D-models which require extensive computing resources, Viz-Images: Bird's Eye - Trees is an effective way for adding 170 trees in bird's eye view.
The clip-maps of rendered trees are perfect "cut-outs", i.e. blend into their respective background and surrounding beautifully and naturally - they become part of the overall scene and don't look artificial or super-imposed.
Alpha-Channel included
Each 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.
Homepage: http://www.doschdesign.com/products/vizimages/Birds_Eye_Trees.html