&rfx_sendmsg (
  qq{
  
    (let* ((input-file (string-append "$curtmpdir" DIR-SEPARATOR "$in"))
           (image (car (gimp-file-load RUN-NONINTERACTIVE input-file input-file)))
           (layer (car (gimp-image-get-active-layer image))) )
      (plug-in-unsharp-mask RUN-NONINTERACTIVE
                            image
                            layer
                            $p0 ; radius
                            $p1 ; amount
                            $p2 ; threshold
                            ) 
      (rfx-save-frame image "$out") )

    }
  );

