Saber Posted May 14, 2008 Share Posted May 14, 2008 Hi friend i was trying to implement my own orennayar based on Siggraph paper. i have found the shader example on the internet are not the most accurate once their are just a light version or a light approximation of the Orennayar. http://rapidshare.com/files/114784289/orennayar.pdf.html here i have uploaded the siggraph paper. and in the paper their is Three approximation . i was able to simulate the last and the second one (one is the pixar Clay) and one is a differenta approx model . i was getting some trouble implementing the advance model . The equation that i'm trying to implement start from page 10 and u can read all the doc it's real interesting. my problem was to get right the angle of the microfacet and their normal . wich is Theta_A and Phi_A i was unable to find how to implement this. so any help i appreciate alot . the rest of the code is clear my confusion is just how to find the right Theta_A angle. thx for any help in Advance. Quote Link to comment Share on other sites More sharing options...
kensonuken Posted May 17, 2008 Share Posted May 17, 2008 http://forums.odforce.net/index.php?showtopic=7131 Quote Link to comment Share on other sites More sharing options...
Saber Posted May 17, 2008 Author Share Posted May 17, 2008 thx friend but this is not the some version that i'm trying to implement. their is 3 approximation on the orennayar one is more accurate then the other. and i'm working to implement the more accurate one. Quote Link to comment Share on other sites More sharing options...
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