Paper‐cut is one of the most characteristic Chinese folk arts, often used during festivals and celebrations. Chinese artists have used paper‐cut to make animations. Typical paper‐cut artwork is made with 2D illustrations on paper, and making many frames necessary for an entire animation can be tedious and expensive. We present a system that allows a designer to directly annotate a 3D model with paper‐cut patterns, while still allowing for adding an artistic touch to the design. We have designed special motifs coupled with templates, resulting in a parameterized set of decorative paper‐cut patterns which give the artist flexible control and allow editing of the pattern size, orientation, and shape. The artist chooses a pattern and places the pattern on the model in the desired position. The system determines actual surface coverage and trims the object's surface geometry to simulate the cut‐out effect we observe in traditional 2D paper‐cut art. We demonstrate that our system allows faster and easier addition of paper‐cut decoration to 3D models compared to general purpose modeling tools, such as Maya. Animations made with the 3D paper‐cut models escape from the limitations of traditional 2D paper‐cut animation on the movement in perspective, furthermore, our system allows for easy pattern animations on 3D models, which is very powerful but hard to do with traditional paper‐cut animation. Copyright © 2007 John Wiley & Sons, Ltd.

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