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Anyone know of a way to get this look, where it goes to white(or a diffuse material) instead of dark? I haven't had any luck getting anything to work without tricking in comp. This is NOT absorption or fog(in vray mtl terms), its something else.
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cant you render out a mask, a fully transparent version, reflection pass , and a white diffuse pass, use the mask to blend the 2, and comp them to get that effect? -
blend shader maybe?
it looks like the glass is painted inside... not really fog or absorbtion.
Just a thoughtComment
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You can do a comp trick for sure, and it works fairly well. If you set transparency to 100%, and refraction of 1 and a Fog of almost solid, and place that over a white background. The only problem is that it works fine with a shallow ray depth, but when the object crosses itself, the matte doesn't work so well.
As far as the physical method goes, im fairly certain its not just that the glass is simply painted inside. There is some fine particulate suspended within the glass. Im not sure where if Vray material fog is working yet, but I think it would be doable if I could just dupe the surface, fill it with fog set to only be visible in refractions, and then have a glass "shell" around it for refractions, spec and shadows.
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