Sample Decorrelation in BRDF Preconvolution for Image Based Lighting

Introduction During my time as a member of the HDRP team at Unity, one of the systems I contributed to was the split-sum approximation-based image-based lighting, more precisely for the Sheen lighting model (rough cloths), back in 2018. Recently, while implementing IBL for the engine I m building at my job, I revisited the HDRP code Continue reading Sample Decorrelation in BRDF Preconvolution for…