Chagall Reference   Airbrush              12.5.93
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   The 'Airbrush' sprays opaquely, with an even
   structure. Its shape is round and the intensity 
   of its action reduces towards the edges.

   If the maximum intensity has been selected for
   the brush then the background will be covered  
   with the selected colour; otherwise multiple 
   application of the tool will be necessary to  
   achieve this.

