I can't see what's going on...the first thing your eye looks at is not the render. It's too bright. Darken the sides and brighten up the middle.
You can't tell what you're looking at. And always put the image in your post, rather than saying "it's in your current." That ensures that this thread isn't useless in the future.
Your best yet. But I dont like how you can barely see the render. As long as you fix that up, the colors are great. But maybe you should put an orange to brown gradient map on it.