Yes, if a material has the same IOR for reflections and refractions using the physical material is a great way to achieve the results. But if you have a glass with some anti-reflections coating you need to adjust the reflections IOR separately...
I understand that the Physical material has the locked IOR for both channels but in the "real world" is not true this way because the "refractions IOR system" is not the same of the "reflections IOR system". The first one is a ray that pass through the surface and is physically correct, but the second one is a ray that hit the surfaces and the GLASS needs a second controller for the final results. As I wrote on my previously messages, how can I dimm a reflections into a car windshield? dimmed by an anti reflections coating treatment?
(BTW, a glass plate, being flat, really shouldn't show any bending of light due to refraction, which is why Thin is recommended for windows, car windshields, etc.)
ehm...IMHO is not the right way to achieve a glass. Thin shell is used for poly surface without internal volume mass. Glasses must be created with IOR and thin shell turned off otherwise you will render two separated flat surfaces...take a look to attached image.. (LEFT plate a standard Glass, on the RIGHT the Thin shell turned on)
Anyway no problem, now I understand that the Physical material has not way to dimm the IOR reflections...
Thanks for your time
Alex :)
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