It doesn't get picked up by the script listener either.
Then I guess it is beyond Scripting’s reach.
Which may not be that surprising, because the settings can’t be saved either, as far as I can tell.
What are you trying to achieve?
A crude workaround (via changing the canvas size for example) seems possible.
I was just working on a script to process a series of images. Part of that process was to do a radial blur on a layer. A quick get around is to set up th inital image with the centre of the radial blur in the correct place. As long as the images you are working on are the same size the results will be the same.
I was just suprised that this parameter was omitted, that's all.
Well, the Filter seems to be one of the rather old ones as evidenced by the Filter’s dialog window.
There are several requests for improvements of the Filter over at
maybe you should add the issue of insuffiient Scripting support to one or start a new thread.