Stylized Keyframe Animation of Fluid Simulations

An upward-flowing jet of ink rendered in oil pastel. An underlying simulation is used as input to guide the artwork (frame 45 is shown). Frames 50, 60 and 70 are hand-drawn keyframes, while the remaining in-betweens were generated automatically by our system. We present a method that combines hand-drawn artwork with fluid simulations to produce animated fluids in the visual style of the art-work. Given a fluid simulation and a set of keyframes rendered by the artist in any medium, our system produces a set of in-betweens that visually matches the style of the keyframes and roughly follows the motion from the underlying simulation. Our method leverages recent advances in patch-based regenerative morphing and image melding to produce temporally coherent sequences with visual fi-delity to the target medium. Because direct application of these methods results in motion that is generally not fluid-like, we adapt them to produce motion closely matching that of the underlying simulation. The resulting animation is visually and temporally co-herent, stylistically consistent with the given keyframes, and ap-proximately matches the motion from the simulation. We demon-strate the method with animations in a variety of visual styles