The Ph.D. dissertation Rendering Methods for Augmented Reality by Jan Fischer describes several GPU-based methods for artistic and illustrative rendering. A real-time video filter is described, which generates a cartoon-like version of the input video and is executed entirely on the GPU (Section 3.3). Section 4.2 of the thesis discusses a GPU-based algorithm for the real-time illustrative display of hidden structures in polygonal datasets. In Section 4.3, the real-time conversion of augmented reality video streams into an illustrative style on the GPU is described. The thesis discusses the underlying image processing and rendering algorithms as well as implementation-specific aspects of the respective GPU techniques. (Jan Fischer, Rendering Methods for Augmented Reality, Dissertation, University of Tübingen, June 2006)