"Salutations! I wish to inquire for your permission to obtain an image of you to be included into a game of digital nature. There will be no monetary compensation to be gained for either party, but I will endeavor to include your name in the credits for such a production." PS: I appreciate ur work.
thank you so much for ask me about the permission but I have to say that Isnīt posible, the reason is simple; I Made this piece for a client therefore the illustration belongs to him, He has all the rights over the picture.