@falktx @prokoudine @GIMP It's special layers tied to paths for non-destructive path rendering. So you can change the line color/width/shapes or the fill for instance. And you can edit the path anytime independently.

So yes, it's vector graphics in GIMP. Like "stroke path" on steroids, because unlike the "stroke" feature, it's non-destructive (you can change the render anytime without undoing).