Computer graphics researchers have been collaborating successfully with engineers, architects, and artists for decades, focusing on better tools for model and image creation. Graphics researchers have already developed a wide range of procedural (automatic) modeling techniques, but with few exceptions, these focus on modeling natural objects, such as plants, terrains, and water. The next generation of tools must automate modeling of the most common and complex elements of digital content: manmade artifacts such as cities, buildings, vehicles, and furniture. Creating these tools require a new and close collaboration with architects as well as urban and industrial designers