Commit: f423c4191f3d744cc142ed61b217c2feaa5cb328 Author: Weizhen Huang Date: Wed Dec 7 15:36:56 2022 +0100 Branches: master https://developer.blender.org/rBf423c4191f3d744cc142ed61b217c2feaa5cb328
Cycles: credit the original light tree paper and explain modifications =================================================================== M intern/cycles/kernel/light/tree.h =================================================================== diff --git a/intern/cycles/kernel/light/tree.h b/intern/cycles/kernel/light/tree.h index 95a7fa0ed79..7429c29ea60 100644 --- a/intern/cycles/kernel/light/tree.h +++ b/intern/cycles/kernel/light/tree.h @@ -1,6 +1,17 @@ /* SPDX-License-Identifier: Apache-2.0 * Copyright 2011-2022 Blender Foundation */ +/* This code implements a modified version of the paper [Importance Sampling of Many Lights with + * Adaptive Tree Splitting](http://www.aconty.com/pdf/many-lights-hpg2018.pdf) by Alejandro Conty + * Estevez, Christopher Kulla. + * The original paper traverses both children when the variance of a node is too high (called + * splitting). However, Cycles does not support multiple lights per shading point. Therefore, we + * adjust the importance computation: instead of using a conservative measure (i.e., the maximal + * possible contribution a node could make to a shading point) as in the paper, we additionally + * compute the minimal possible contribution and choose uniformly between these two measures. Also, + * support for distant lights is added, which is not included in the paper. + */ + #pragma once #include "kernel/light/area.h" _______________________________________________ Bf-blender-cvs mailing list Bf-blender-cvs@blender.org List details, subscription details or unsubscribe: https://lists.blender.org/mailman/listinfo/bf-blender-cvs
