Hi - I'm vectorizing some characters from Photoshop for someone for t-shirt printing and stickers. It is all black lines with solid colors for the most part, but there are a couple areas with gradations. How should i deal with this in the vector version? I think i need to make it print dots of another color over the first color to make the gradation but I'm not sure how to do this. If I live trace it, it looks terrible. Anyone?