Chipp, You're right of course, its called opposite not invert. The same effect is obtained by using the generic 'filter' I editing the filter function to go down instead of up. Anyhow, I'm glad it worked. I finally got around to trying it too this evening. Not only is it possible to do a single cloud or a cloud with a hole, it's possible to do both in the same image, as in the attached image of my 'dropout cloud' - that's what happens when an adventurous cloud wants to explore the sea underneath, it didnt realize it will tear a hole in the social fabric of the cloud layer:).Here I used  2 cloud layers, one with the single cloud and one with the hole. The obvious extension of this - as many single clouds as you want, each in a layer of its own. (No,  it isnt the same as using a regular layer of clouds since you can put each single cloud precisely where you want it.) Doing many holes isnt as trivial since the hole in one layer will be covered by the 'non-hole' of the other. But it should be possible  by manipulations in the function editor. That's quite entertaining:)

"I paint that which comes from the imagination or from dreams, or from an unconscious drive. I photograph the things that I do not wish to paint, the things which already have an existence."
Man Ray, modernist painter
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