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Test Nonphotorealistic Rendering on Terrain

Non-PhotoRealistic Rendering (NPR) turns a photograph into a caricature that captures the essence of an image. Therefore, the image is more recognizable.

This project is to research this idea, and then to try it on terrain. Starting with the elevation array, identify and sketch in ridges and valleys.

Cartographers have been doing the basic idea for centuries. The new idea is to test recent NPR techniques from Computer Graphics.