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[Nemi]

So I'm modifying a red t-shirt for my bf, but I have no idea what's the most effective way to put this design on.

Here's reference: http://images3.wikia.nocookie.net/__...erals%29_t.gif

I hope the image isn't too small. I couldn't find any other good reference picture.

Thanks in advance.

[Syagria]

Option one: paint it on (directly, or by making a stencil) with fabric paint.
Option two: get iron-on photo transfer paper, print the design on the paper, and iron the image onto the shirt (caveat: on a bright red shirt, the image might not be as vibrant or stand out as much as you may want it to).
Option three: applique using a contrasting fabric (most complicated and time-consuming method).