Recent work has shown that the error of Monte-Carlo rendering is visually more acceptable when distributed as blue-noise in screen-space. Despite recent efforts, building a screen-space sampler is still an open problem. In this talk, we present the lessons we learned while improving our previous screen-space sampler. Specifically: we advocate for a new criterion to assess the quality of such samplers; we introduce a new screen-space sampler based on rank-1 lattices; we provide a parallel optimization method that is compatible with a GPU implementation and that achieves better quality; we detail the pitfalls of using such samplers in renderers and how to cope with many dimensions; and we provide empirical proofs of the versatility of the optimization process.
@article{arxiv.2105.12620,
title = {Lessons Learned and Improvements when Building Screen-Space Samplers with Blue-Noise Error Distribution},
author = {Laurent Belcour and Eric Heitz},
journal= {arXiv preprint arXiv:2105.12620},
year = {2021}
}