jon3de Posted April 16, 2020 Share Posted April 16, 2020 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 twoSidedShader_01.hip Quote Link to comment Share on other sites More sharing options...
Nicholas Ralabate Posted April 16, 2020 Share Posted April 16, 2020 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... Quote Link to comment Share on other sites More sharing options...
vicvvsh Posted April 16, 2020 Share Posted April 16, 2020 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. Quote Link to comment Share on other sites More sharing options...
jon3de Posted April 20, 2020 Author Share Posted April 20, 2020 Hm....increasing Bias indeed solves the problem here but will give me a lot other render problems with smaller objects. Quote Link to comment Share on other sites More sharing options...
jon3de Posted May 6, 2020 Author Share Posted May 6, 2020 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. 1 Quote Link to comment Share on other sites More sharing options...
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