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Non-photorealistic rendering (NPR) is a type of computer graphics that emulates artistic rendering styles, as well as enabling new ones. In contrast to traditional computer graphics, which has focused on photorealism, NPR is inspired by artistic styles such as painting, drawing, technical illustration, and animated cartoons. NPR has appeared in movies and video games in the form of "toon shaders," as well as in architectural illustration and experimental animation.
The term "Non-photorealistic rendering" appears to have been coined by David Salesin in his paper with Winkenbach in 1994. Many other names for the field have been proposed, such as "artistic rendering", "non-realistic rendering", and "art-based rendering".
References
Some key papers in the development of NPR are:
- "Paint by Numbers: Abstract Image Representations", by Paul Haeberli, SIGGRAPH 90
- "Comprehensible rendering of 3-D shapes", by Saito and Takahashi, SIGGRAPH 90
- "Computer-Generated Pen-and-Ink Illustration", by Winkenbach and Salesin, SIGGRAPH 94
- "Interactive Pen-and-Ink Illustration", by Salisbury, Anderson, Barzel, Salesin, SIGGRAPH 94
- "Painterly Rendering for Animation", by Barb Meier, SIGGRAPH 96
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