Character Animator to Media Encoder Background Issues

Hello,

I'm sure this is an often debated question ... Although, I could not find an answer in the discussion thread. I made a character in Character Animator with a white background and then exported it to Media Encoder. The background is black and I don't see any options to modify this. The only setting change I came across was the Render Alpha Only which changed my character from a Rottweiler puppy to a white image. Does media encoder allow for background changes and if so, what are the steps?

Thanks so much