Cloud library revisited

[N-drju]

Hey guys,

     I was wondering if you could help me out with this clip file I found in our outstanding cloud library:

http://www.planetside.co.uk/forums/index.php/topic,3691.msg85522.html#msg85522

     Now, as much as I like this cloud solution I can't seem to find a way to randomize the cloud pattern here, no matter how I change the "billows" fractal that, I thought, was responsible for the cloud pattern. Basically, clouds are always placed in exactly the same areas no matter how you change the nodes. This becomes evident when you decrease the cloud coverage to about -0.4. You'll get pieces of sky that are always devoid of clouds, regardless of the changes you make.
     Do you have any idea how I could customize the cloud pattern here without screwing the whole effect up? The only node that seems to change pattern of the clouds here is "color adjust" node, but that does not work very well.
     This is a very nice clip file, but I don't like the idea of having exactly the same cloud layout every time I apply it. Any ideas on how to change the location of cloudy and cloudless spots, or which node needs modification?

[Dune]

If it's Matt's mackerel sky you're referring to, I just had a look at it. You can add a constant scalar to the seed input of 3D perlin and change the value for different coverage (the billow only gives you the small blobs, the 3D perlin the bigger ones)). Also you can add the whole line into the mask input of a big cloud or PF, and change that seed for overall cloud pattern that give sthe mackerel sky.

[N-drju]

Oh, this way? I tried to add PF to the seed input...?

[Tangled-Universe]

You can't use a PF as seed input, because the seed input expects a single value/scalar input.
A PF generates different values everywhere.

[N-drju]

@ Dune; Just checked that scalar thingy. Thanks Ulco! That helped. I'll check the second solution too.

@ Tangled-Universe; I thought that if there's seed input there you can put the PF because, after all, any given fractal uses just a single seed. I guess that was not quite it...

[Dune]

You might if you use a huge size and both colors set at white in a PF. It's still interesting to play with that, and see what happens. I did a while ago, and found that colors and numbers are quite interchangeable.