https://community.intel.com/t5/Intel-Embree-Ray-Tracing-Kernels/One-sided-triangle-intersection-only/m-p/1117681#M630 I don't believe so. You need to use the filter function and test which side of the triangle was hit and discard those hitting the wrong side. Thu, 05 May 2016 16:40:07 GMT Al_N_ 2016-05-05T16:40:07Z https://community.intel.com/t5/Intel-Embree-Ray-Tracing-Kernels/One-sided-triangle-intersection-only/m-p/1117680#M629 <P>Is there a flag to tell Embree to only return hit intersections for "one sided" triangles</P> <P>I.E. If the triangle's normal was pointing away from the casting ray, opposed to if they were in opposite directions.</P> Thu, 05 May 2016 04:40:02 GMT https://community.intel.com/t5/Intel-Embree-Ray-Tracing-Kernels/One-sided-triangle-intersection-only/m-p/1117680#M629 Tony_M_2 2016-05-05T04:40:02Z https://community.intel.com/t5/Intel-Embree-Ray-Tracing-Kernels/One-sided-triangle-intersection-only/m-p/1117681#M630 I don't believe so. You need to use the filter function and test which side of the triangle was hit and discard those hitting the wrong side. Thu, 05 May 2016 16:40:07 GMT https://community.intel.com/t5/Intel-Embree-Ray-Tracing-Kernels/One-sided-triangle-intersection-only/m-p/1117681#M630 Al_N_ 2016-05-05T16:40:07Z https://community.intel.com/t5/Intel-Embree-Ray-Tracing-Kernels/One-sided-triangle-intersection-only/m-p/1117682#M631 <P>Compile Embree with the RTCORE_BACKFACE_CULLING cmake option enabled, and all back-facing triangle will be ignored.</P> Fri, 06 May 2016 05:40:47 GMT https://community.intel.com/t5/Intel-Embree-Ray-Tracing-Kernels/One-sided-triangle-intersection-only/m-p/1117682#M631 SvenW_Intel 2016-05-06T05:40:47Z