Using paintings or on-the-spot "pixel art" on shirts might be difficult for how to reliably select and maintain them, however this does indirectly present the idea of a separate form of customisation. Rather than actually drawing a shirt, there could be a new Savii section (e.g. "Shirt Designer") allowing choice of templates--possibly even sold from the Market Place, a few puzzle pieces for variation, a colour selector, maybe even a limited text mechanism as was suggested above. Gradience and hue scales are kinda crazy but sure would send Savii design over the top. Given the already established custom nature of Saviis, addition of further personalization options seems pretty viable.
By jen-naythompson (18)
By Limxzero (5329)
By Saubes (1244)
By