Rendered in Bryce 7, postworked in Irfanview.

Here's how: the camera was placed inside a terrain with a reflective material and an unusaully colorful sky. The original looked like this:
http://bentibbetts.net/st orage/pink2-3(2)_small.jp g

Then, I edited the image in IrfanView using the "Swap colors" and "Auto adjust colors" options.

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