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I took part in a Detective art swap on Ten Paces and draw and got a lovely sketch from Levi Hastings to work with. (Everybody of the participants has to do a sketch which get swapped and one has to do a final illustration to the sketch one received.)
I stayed pretty close to the sketch, you can see it and the other swap participants here.
And this was my sketch, which Levi had to do a final illustration to:
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Coincidentally I had a similiar idea like Levi. ;)