## 2025/05/26, v2: - Corrected the computation of beta in algorithm 5 in appendix B from \beta \gets r_k / r_{k-1} to \beta \gets |r_k|^2 / |r_{k-1}|^2. ## 2025/02/28, v1: Authors version of the manuscript that was published at ACM Transactions on Graphics 2025.