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jon3de

two sided shader - normales are messed up on backface

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I have a simple setup with a two sided shader. On the backface somehow my normals are messed up and I cant get them fixed. Anyone has an idea and can help me out? Thank you. 

kind regards

Jon

twoSidedProblem.jpg

twoSidedShader_01.hip

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Could it be that your diffuse limit on the Mantra ROP is too low?  I'm not sure why that would come into play on a transparent material though...

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Hi, increase Reytracing Bias parameter in Shading tab of Mantra ROP, something to 0.01. Don't ask me why, i only know what the help says.

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Hm....increasing Bias indeed solves the problem here but will give me a lot other render problems with smaller objects. 

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This is an issue with the fix of the shadow terminator issue. Adding this as a parameter to the grid and uncheck it fixes the problem. 

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