2D Shading for Cel Animation

In this paper we present a semi-automatic method for creating shades and self-shadows in cel animation. Besides producing attractive images, shades and shadows provide important visual cues about depth, shapes, movement and lighting of the scene. In conventional cel animation, shades and shadows are drawn by hand. As opposed to previous approaches, this method does not rely on a complex 3D reconstruction of the scene: its key advantages are simplicity and ease of use. The tool was designed to stay as close as possible to the natural 2D creative environment and therefore provides an intuitive and user-friendly interface. Our system creates shading based on hand-drawn objects or characters, given very limited guidance from the user. The method employs simple yet very efficient algorithms to create shading directly out of drawn strokes. We evaluate our system through a subjective user study and provide qualitative comparison of our method versus existing professional tools and state of the art.


Code Implemented in Pencil 2D, available soon.

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This entry was posted in Animation & Computer Graphics (CG), Research, Visual Effects (VFX) by Matis Hudon. Bookmark the permalink.
Matis Hudon

About Matis Hudon

I obtained my engineering Degree in Electronic (specialized in Multimedia Technologies) from ENSEIRB-MATMECA graduate school of engineering. I obtained my PhD at the University of Rennes 1 at IRISA Rennes France in collaboration with Technicolor Rennes France. My research interests are computer vision, acquisition, geometry enhancement and up-sampling techniques, photorealistic and non-photorealistic rendering. I am currently focusing on 2D animation techniques.