We loved the Night Strike Duke art that ReSaurus created for the retail packaging. This was a version of Duke we planned to have in Duke Nukem Forever during a night level/mission, with a black shirt replacing his signature red shirt, plus a black cap to hide his bright hair.
One of the reasons why Duke Nukem Forever looks so dull with the post processing is because each level has a value set to desaturate it's colors. But this can be changed, setting the desaturation to negative values brings the saturated colors and makes it look a bit more vibrant.
