Ahh. Well you see the starfield is a sky preset. It has it's own sky color, light color etc. Since the scene is effect by the sun and atmospheric values. The colors of the objects and landscape change. It though there was a option to turn off affected by sky somewhere. Since I do not use Bryce very much any more maybe some one else can elaborate. But what is happening is not your fault, it is just the way Bryce does things. Another thing I hope the improve in B5.