I also submitted this as a bug : issue 762159. Now that the default parameters has become "Default - Medium" (making it, no more or less default than the other "Default" parameters) things have become extra confusing. Consider this: I change the Default Parameters to Default-HighResolution. Then I go any object's lighting properties and see "Default-Medium" in the Advanced properties. Is it using Default-HighResolution? If yes, then why is it showing something different?, also, if I want to override it and have actually use the "Default-Medium" how do I do that? Or is is actually using "Default-Medium"? In which case what is the point of of the "Default Parameters" parameter in the lighting window? I think the solution to this, is something like this: Have the dropdown of "Advanced Parameters" be disabled by default and have a "override" tickbox. If the override tickbox is not ticked, it uses whatever is in the "Default Parameters", if you tick it, then the dropdown becomes enabled and and you can choose whatever you want.