This was a Tshirt design I did for a local convention. I can proudly say that it was accepted, printed, and sold for profit.
So much went into this, from the diamond composition, to getting the halftone effect just right. Halftone was SUPER important here because the print shop would have charged for every color/shade. Solid white to save money, it was. I learned a lot along the way.
I even learned months later that you can make illustrator automatically do a halftone effect... Noted.