The reflection plane currenty is a flat surface. However objects such as a chrome dome is not flat so the refelction plane cannot create a refelctiive chrome surface that is not flat. Ideally it would be good to add a refelction plane to the matreial itself as an option so no matter what shape of the object a reflective qaulity can be added to that surface no matter the sahpe.This would go beyond a gloss qualty to the material.  At the very least a reflection plane should come in various shapes such as the forms in the object library.