The lower right one is what I want, but I don't get it.
my color_map -
[0.0  rgb 0.5 transmit 1.0 filter 0]
[0.3  rgb 1.0 transmit 0.7 filter 0]
[0.9  rgb 0.0 transmit 0.1 filter 0]
[1.0  rgb 0.0 transmit 0.0 filter 0]

What POvray version you have used?

No, I don't want to make craters. Its part of an automatic vegetation
distribution approach.

Norbert Kern

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