Shows a sphere color mapped with a topographic map of the earth with
the usual colors (shades of blue for below Zero, green, yellowish to
brown for increasing heights) and bump mapped using a greyscale image
of the same data. To add a little ambience I added a second sphere
with turbidity to simulate a (way too thick!) atmosphere. This image
is not meant to look like the earth in space, but I like it anyway.

	Pink