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71.txt

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All images are rendered at 512x324. The upper left figure is not antialiased. The figure to its right was rendered with mipmapping. The textures are a little better. In the bottom row, the left image was supersampled at a rate of nine samples to one pixel. The final image benefited from 9:1 supersampling and mipmapping.

Next and final images (not available):
The final series of slides, courtesy of Evans and Sutherland, demonstrate mipmapping. The foreground in these images is texture mapped using the bigger mipmaps containing more detail, with the smaller mipmaps reserved for the background. In slide 75, compare cultivated fields in the foreground with those in the background. The technique is effective in simulating a wide variety of terrains, as can be seen in slides 76-78. Evans and Sutherland develop flight simulators to train pilots. These simulators project views of what the pilot would see if actually flying the plane (slide 79). The simulators change the views as the pilot flies the plane, and must react instaneously with new views in response to pilot commands. Mipmapping heightens the sense of reality by adding detail to the views.

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