If you mix it with yellow belly I'd have to say the results could be a mixed bag. Just look at the Highway and Freeway combos, each one seems to have a completely different look even though the only thing in the snake is yellow belly and gravel (or asphalt). I'm thinking that there are many different lines of yellow belly with slight differences. You can hardly tell a yellow belly from a normal when it's on it's own but mixed with the right genes you can clearly tell a difference between different yellow belly lines.