sPECtre

In another forum, a member asked for a plug-in that would allow him to have multicolor clouds...

The answer is simple: the simple clouds filter, but used on each color channel:
Replace Command by CTRL on a PC

"New file.
Target R Channel.(Command+1)
Filter>Render>Clouds.
Target G Channel.(Command+2)
Filter>Clouds. (Command+F)
Target B Channel.(Command+3)
Filter>Clouds. (Command+F)
Cookies."

To make a lighter result, create a new file in LAB, and run clouds only on the *a and *b channels

Again, do not simply follow the steps, there are a lot of filters and filter combinations in Photoshop!

Welles

This is an illuminating technique, Pierre. 8))