It sounds like you are looking for silk screen printing, which is basically painted into the shirt and the design can encompass as much of the shirt as you want, all the colors you want and done without the standard rectangle boxed area. Try looking for a shop in your area. It won't be cheap, because they have to cut the screen to your image specifications and using your colors, but it will be worth it. And, you never know, they may like your art well enough to work out a deal with you. :o)

FlyByNight