Thank you - it was a bit fiddly to work out how to use it, and it creates huge PNGs which I then have to crop down with GIMP, but at least I get smooth edges. For future readers, the settings in filter editor -> general settings apply not to the filter in general but to the specific filter that is a...

I am creating an image which has a blurred line and I have a problem with the outer edges of the blurred path. Whatever I try, the outside edges of the path don't blur gradually, the blur for a while then stop abruptly, resulting in a nasty hard edge to the blur. The path is not filled, so it's the ...