Expressive 2019

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Non-Photorealistic Animation for Immersive Storytelling
(The Eurographics Association, 2019) Curtis, Cassidy J.; Dart, Kevin; Latzko, Theresa; Kahrs, John; Kaplan, Craig S. and Forbes, Angus and DiVerdi, Stephen
Immersive media such as virtual and augmented reality pose some interesting new challenges for non-photorealistic animation: we must not only balance the screen-space rules of a 2D visual style against 3D motion coherence, but also account for stereo spatialization and interactive camera movement, at a rate of 90 frames per second. We introduce two new real-time rendering techniques: MetaTexture, an example-based multiresolution texturing method that adheres to the movement of 3D geometry while maintaining a consistent level of screen-space detail, and Edge Breakup, a method for roughening edges by warping with structured noise. We show how we have used these techniques, along with art-directable coloring, shadow filtering, and shader-based texture indication, to achieve the ''moving illustration'' style of the immersive short film ''Age of Sail''.