Freudenberg, BertMasuch, MaicStrothotte, Thomas2015-02-162015-02-1620011467-8659https://doi.org/10.1111/1467-8659.00511In this paper we show how a game engine designed to generate photorealistic images can be extended to produce non-photorealistic and hybrid renditions. We introduce new hardware-based methods to accomplish pen-and-ink illustrations. The combination of the highly optimized processing of a game engine and the use of hardware for NPR algorithms yields real-time animation of pen-and-ink illustrations.The particular advance of this method is that it yields the first real-time, frame-coherent pen-and-ink animations which maintain both tone and texture.10.1111/1467-8659.00511184-192