I'm getting accustomed to Krita, and I'm at a point where I need to warp some line art. It would be convenient if I could keep the original, as well—at the moment, I'm simply duplicating the normal-mode master line art layer, muting it, and working on the duplicate with the distort brushes.
I kept thinking about the many render layer options, though, and it occurred to me that it might be possible to have one which simply distorts the layers below, like encoding an underlying UV offset? Mute it, I have the original art below it; unmute it, and all of the encoded distortions and scrapes apply? Does such a layer type exist at this time? I feel like it should exist, but I'm not entirely sure what to look for.
In the mean while I'm going to continue with the aforementioned Cave Man method of duplicating the layer.