GIMP

A GIMP Layer Effect for enhancing clouds in digitial images.

I am not certain if this effect actually accumulates anything, it is temporarily named after Cumulus clouds.

Above are the layers: the original image, the blue component and the final accumulated image. Below is the layers dialog for the final image.

Here the same effect is applied to sky and clouds as reflected in water.

• accumulation.xcf.gz
• accumulation2.xcf.gz
• the script layer-effects.xcf.gz
• other unnamed layer effect
• wikipedia Blue
• Norway Skies