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Realistic Model of the Sky
 Brtník, Jan ; Herout, Adam (referee) ; Beran, Vítězslav (advisor)
The simulation of natural phenomena such as clouds, smoke, fire and water is one of the most important research areas in computer graphics. Clouds are an essential component of any outdoor virtual environment, they add an important element of visual detail without which the environment would feel unrealistic. This paper describes an approach for setting up a cloud simulation. Clouds in our system are modeled using cellular automaton. To accelerate the simulation and its visualization, we implement both  entirely on programmable floating-point graphics hardware. The main part of the algorithm is implemented in a fragment shader and therefore takes full advantage of the highly parallel structure. The algorithm can generate result at real-time or near real-time frame rates. We also simulate the interaction of clouds with light, including self-shadowing.
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