Also referenced in this post: http://keyshot.com/forum/index.php/topic,2605.0.html
It would be awesome if one could alter the SATURATION of a HDRI image used for environment in addition to contrast and brightness, and while you're at it you could of course throw in a HUE slider as well.
Thanks for an otherwise wonderful tool!
KeyShot Pro comes with an HDR Editor that allows you to do this. Please contact sales@luxion.com for a trial.