"Difference Clouds" does work in 2.10 you just need to give it a color for it to work and make the difference
I mean, fill a transparent area with a color or black or white
Fill your new doc with white then Filters/Render/noise/Difference clouds > you will got your B&W clouds (black is opposite of white)
Fill your new transparent doc with red then Filters/Render/noise/Difference clouds > you will got your red and cyan clouds (cyan is opposite of red)
You do need to give the script a color to start with, if not it cannot make the "difference" (thus the name "difference clouds")
I mean, fill a transparent area with a color or black or white
Fill your new doc with white then Filters/Render/noise/Difference clouds > you will got your B&W clouds (black is opposite of white)
Fill your new transparent doc with red then Filters/Render/noise/Difference clouds > you will got your red and cyan clouds (cyan is opposite of red)
You do need to give the script a color to start with, if not it cannot make the "difference" (thus the name "difference clouds")