hulk rendering of myself.

how can i improve the reality of the rendering of myself as the

incredible hulk?

One suggestion: your right eye (iris) in the photo is reddish, while the left eye is green. Make both eyes more red than the right eye is now, and clean up the whites of the eyes to increase the color contrast and make them stand out more. In addition, you might make the face a slightly lighter green to add some punch. As is, BTW, it's a pretty good job of being the hulk, and an arresting photo even with none of the suggested changes.

here's the original untouched photo