Auto, the only way i have seen so far to adapt to the two main options ( as i see) Deferred shading and HDR, is what Tom Weiss over at Lockon files ( http://www.****************/?_fromLogout=1) is doing, he makes skins with two specular textures , so you have to replace one or the other depending on if you use DS or HDR. It works but basically you have two skins versions of everything - HDR and DS. Im messing around trying to see if there is a setting that will serve both options, not having much luck though.