#@gimp Tom : tom, tom
#@gimp : picture style = choice("subtle","extreme")
#@gimp : Amplitude = float(0.3,0,5)
tom :
  -to_rgb -rgb2lab                                  # Convert all layers to Lab (no transparency !)
  -repeat @#                                        # Loop over all layers
    -s[-1] c                                        # Split last image as 3 new channel images.
    -if $1 -normalize_local[-3] $2,6.00,5.00,1.00   # Act on luminance only.
    -else -map_tones[-3] $2 -endif
    -a[-3--1] c                                     # Append single channel images into a Lab image.
  -mv[-1] 0 -done                                   # Prepare loop for next layer.
-lab2rgb                                            # Convert back all layers to RGB.