Hi,
I am using mental ray to render the scene with hdri reflections.
The problem im having is trying to only show reflections above a certain luminosity…as you can see when you look at a plastic cd case…generally only high lume values reflect and other darker values allow you to see through the plastic.
Does anyone know how I can reflect just the higher luminosity values using the glass(lume) shader within mental ray ?
Thanks in advance 
Steve