OK. The last go at this one. I tried again to warm things up. Mostly the corn and the onion. I'm seriously doubting the lighting in my studio because I really did warm things up but when I got around to photographing the results I was less than impressed.
The other thing I tried to improve was the 3-dimensional qualities of the corn ears. They're warmer but still don't really look round. I know part of this is trying to mimic the photograph instead of using the photo as a reference, but I just don't have enough experience painting corn to bridge the gap.