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These images of a thunderstorm on June 16, 1997, were generated at
NCSA with forecast data from the Center for Analysis and Prediction of
Storms at the University of Oklahoma. In the top image, rain, ice, snow,
and cloud were rendered as isosurfaces so that the boundary of each moisture
variable was easy to distinguish. Rain is purple, ice is gray, snow is
a translucent teal, and clouds are blue. In the smaller image, only rain
was rendered as an isosurface. The other variables were combined and rendered
volumetrically, which is more lifelike, using values that increased from
black to white. |