Real-time nonphotorealistic rendering
Proceedings of the 24th annual conference on Computer graphics and interactive techniques
Image precision silhouette edges
I3D '99 Proceedings of the 1999 symposium on Interactive 3D graphics
Stylized rendering techniques for scalable real-time 3D animation
NPAR '00 Proceedings of the 1st international symposium on Non-photorealistic animation and rendering
Artistic silhouettes: a hybrid approach
NPAR '00 Proceedings of the 1st international symposium on Non-photorealistic animation and rendering
Computer-generated pen-and-ink illustration of trees
Proceedings of the 27th annual conference on Computer graphics and interactive techniques
Proceedings of the 28th annual conference on Computer graphics and interactive techniques
Hardware support for non-photorealistic rendering
Proceedings of the ACM SIGGRAPH/EUROGRAPHICS workshop on Graphics hardware
Line-Art Rendering of 3D-Models
PG '00 Proceedings of the 8th Pacific Conference on Computer Graphics and Applications
Performance evaluation for real-time cartoon rendering using GPU
GVE '07 Proceedings of the IASTED International Conference on Graphics and Visualization in Engineering
Stylized vector art from 3D models with region support
EGSR'08 Proceedings of the Nineteenth Eurographics conference on Rendering
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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.