It looks like it doesn't really have a UI -- is there a version factored out of GIMP that just takes the source image and a mask image as arguments?
For the art producers the Photoshop version would me massively superior just for integrating with the UI, but for our purposes a version of this as a standalone utility or baked into PIL or ImageMagick would be fucking awesome.
Gimp has a batch mode that lets you run commands without loading the UI. That would probably achieve the same thing, although it might be a little much if you're sure that all you want is resynthesizer.
For the art producers the Photoshop version would me massively superior just for integrating with the UI, but for our purposes a version of this as a standalone utility or baked into PIL or ImageMagick would be fucking awesome.