SketchaWorld uses procedural sketching for game world design. Designers sketch a landscape and add features like roads and cites. The system then generates a 3D world while ensuring the generated terrain fits in with its surrounding (e.g. by adding a bridge to cross a river).
‘User input consists of a 2D digital sketch: a rough layout map of the virtual world, created using simple and clear editing tools. Each sketch element is procedurally expanded to a corresponding terrain feature.
These generated terrain features are placed in logical layers of the terrain model and are automatically fit with their surroundings. Once satisfied with the generated results, designers can save the 3D virtual world model and export the world to other relevant formats, such as GIS data.’
HD, CB, HFF, CFF
Smelik, R. M., Tutenel, T., de Kraker, K. J., & Bidarra, R. (2010, May). Interactive creation of virtual worlds using procedural sketching. In Eurographics (Short papers) (pp. 29-32).