BibTex Entry:

  author = {Holger Winnem{\"o}ller and Shaun Bangay},
  month = {February},
  year = 2003,
  title = {{R}endering {O}ptimisations for {S}tylised {S}ketching},
  booktitle = {ACM Afrigraph 2003: 2nd International Conference on Computer
              Graphics, Virtual Reality and Visualization in Africa},
  pages = {117--122},
  publisher = {ACM SIGGRAPH},
  organization = {ACM},
  abstract = {We present work that specifically pertains to the rendering
             stage of stylised, non-photorealistic sketching. While a
             substantial body of work has been published on geometric
             optimisations, surface topologies, space-algorithms and natural
             media simulation, rendering-specific issues are rarely discussed
             in-depth even though they are often acknowledged. We investigate
             the most common stylised sketching approaches and identify
             possible rendering optimisations. In particular, we define
             uncertainty-functions, which are used to describe a human-error
             component, discuss how these pertain to geometric perturbation
             and textured silhouette sketching and explain how they can be
             cached to improve performance. Temporal coherence, which poses a
             problem for textured silhouette sketching, is addressed by means
             of an easily computed visibility-function. Lastly, we produce an
             effective yet surprisingly simple solution to seamless hatching,
             which commonly presents a large computational overhead, by using
             3-D textures in a novel fashion. All our optimisations are
             cost-effective, easy to implement and work in conjunction with
             most existing algorithms.},
  keywords = {3D Texturing; Coal, Pencil, Chalk, Hatching, rendering;
             Edge-fading; Non-photorealistic rendering; Temporal coherence;