Ras Posted October 29, 2004 Share Posted October 29, 2004 Hi again I´ve run into a problem with my Architectural glass and alpha channels. It seems that when i save my image and try to use the alpha channel to map my background into the picture the glass appears as a completely opaque object?!? I don´t know how to work aroun this problem. I have no problem when using a standard material with for example 20% opacity but Architectural glass is so much nicer... What to do? Link to comment Share on other sites More sharing options...
Ras Posted November 12, 2004 Author Share Posted November 12, 2004 Helloooooo?!? [knock-knock] Is this thing on? Link to comment Share on other sites More sharing options...
abicalho Posted November 12, 2004 Share Posted November 12, 2004 The architectural material glass has refraction. Refracted transparency cannot have an alpha channel. Set the IOR to 1.0 and it should have a transparent alpha. Alexander Link to comment Share on other sites More sharing options...
Ras Posted November 15, 2004 Author Share Posted November 15, 2004 Hi Alexander Thank you very much for your answer. So let me see... I cannot use caustics then - I guess caustics are refraction dependent - right? Also - I´ll loose the nice distortion that glass with thickness produces (like a prism) when IOR is 1, right? What kind of glass do you recommend that I use then if I want to have alpha channel mapping available and still have realistic looking glass? Link to comment Share on other sites More sharing options...
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