<a href="images/yelCloudSCna.mov">[View QuickTime Movie]</a>
Yellow sky? What planet is this? Stare at the cloud for awhile. Notice how the mid-value greys take on a bluish tone. Aha, you are afterimaging! In time, with concentration, this effect spreads to the background around the movie. Click the movie to popup a window with a black background for comparison. Also click the Recolor button to experiment with different background colors. Click the browser "Refresh" or "Reload" to return to the grey background.

To see the movie, if you don't have a QuickTime plug-in for your browser (PC or Mac) see http://www.apple.com/quicktime/. For help see immersive interactive imaging. For background, see Color afterimage.

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