Of course we already can merge multiple layers in ArtRage, but what if we want to keep those hidden layers? This script will merge all the visible layers in your painting, while leaving the hidden layers intact.
But wait! There's more!
There's also an option to keep a copy of the layers being merged.
Word of caution: I have tested this script on my paintings, but not on yours. Please be sure to save your work before running this script!