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    $\begingroup$ You could use a convolution, like at blendswap.com/blend/20964 . That's old, but it may still work, and in any case demonstrates the technique. $\endgroup$
    – Nathan
    Commented Mar 17 at 14:36
  • $\begingroup$ That's works perfectly! Thank you! $\endgroup$ Commented Mar 17 at 21:28