This is where I turned hot spots up real high think it works better.

 

Gimp has a smudge brush I use a lot also.

 

Turn the bit down so I have a few colors kinda like a 8 bit then blend with smudge .

 

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The Artist that will fight for decades to conquer their media.
Even if you never know their name ,your know their Art.
Dark Sphere Mage Vengeance