Attached Link: http://www.vray.info/entry.asp?entryID=77

***"I wasn't aware that non transparent objects had refraction... Refraction is the resulting change in angle when light enters a new median, water, glass, etc. If light is not transmitted through the object, it has negligeable refraction."***

EVERYTHING has an index of refraction. Refraction is simply the bending of light as it travels from one location into another of different density. Every object and voluminous mass, if it's transparent or not, bends light in a certain way and to a certain degree, depending on it's density. Even AIR. This is known as Index Of Refraction (IOR)

See the link attached for the exact IOR of various real materials. I'm not aware that Bryce supports true physical IOR values for it's materials. Modern renderers in programs like Cinema4D and 3dsMax have support for these physical properties on a material level, which adds to the realism of the way lights in a scene react with objects and increases realism in the renders. Many 3D programs today support IOR values, but some do not. Even Poser 5 has a refraction node where one can adjust the IOR value of a material to immitate that material's real life interaction with light. Message edited on: 09/01/2004 01:42

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Tools :  3dsmax 2015, Daz Studio 4.6, PoserPro 2012, Blender v2.74

System: Pentium QuadCore i7, under Win 8, GeForce GTX 780 / 2GB GPU.