Recently, many researchers have focused on the technique called non-photorealistic rendering. By using the technique, images that are similar to hand-drawn pictures can be generated automatically. Especially, methods for creating cartoon style pictures are often utilized since the methods can significantly reduce the word load required in the traditional manual animation production process. In this research, we propose an interactive method for cartoon rendering of smoke. In our system, the motions and densities of the smoke are calculated by using the computational fluid dynamics. For the cartoon rendering of the smoke, particles are generated in the flow. For each particle, the user can attach an arbitrary density distribution to determine the small-scale details of the smoke shape. This makes it possible to generate smoke with the desired details. The small-scale details can be interactively edited by a sketch-based user interface.
