An amusing side-effect
It's happened before that a coding mistake produced a very attractive side-effect, but this one is nice enough that I'd wish I could add a plugin to krita to do specifically this. But we're in string freeze now. Running the raindrops filter as an adjustmentlayer shows a bug in our filter API: filters are supports to read from a source paint device and write to a destination paint device, where source and destination are allowed to be the same object. But that needn't be true, and here we see the effect of a filter that does expect them to be different paint devices:
