Never thought of "clarity" as a P4/Firefly render issue. However, my eyes are definitely not 20/20 at my age. Would like to kill whose who print cooking instructions in <8 font. Shaders are still largely a mystery to me also. You have a point, due to my lack of knowledge of these issues. Material Room Shaders? Yes , I have heard of these creatures, but never used them. Please excues my ignrance, but are they worth 7-8 hours of hum in my bedroom?