We present a non-photorealistic rendering approach to capture and convey shape features of real-world scenes. We use a camera with multiple flashes that are strategically positioned to cast shadows along depth discontinuities in th

An interactive introduction to OpenGL programming (PDF Download Available). Available from: http://www.researchgate.net/publication/228656776_An_interactive_introduction_to_OpenGL_programming [accessed Jul 6, 2015].