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Carnegie Mellon University: Alice V2.0
Learn how to program with Alice v2.0! Utilizing easy-to-learn drag-and-drop methods, Alice provides a wonderful introduction to programming methods. Create 3D graphics, a video game, a movie, or other interactive environment!
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Photorealistic Scenery Rendering Software
Terragen is a free scenery generator for Mac and Windows. The site includes a free Terragen download and tutorials on how to create 3D landscape visualizations.