A vital component of photo-realistic image synthesis is the simulation of indirect diffuse reflections, which still remain a quintessential hurdle that modern rendering engines struggle to overcome. Real-time applications typically pre-generate diffuse lighting information offline using radiosity to avoid performing costly computations at run-time. In this thesis we present a variant of progressive refinement radiosity that utilizes Nvidia's novel RTX technology to accelerate the process of form-factor computation without compromising on visual fidelity. Through a modern implementation built on DirectX 12 we demonstrate that offloading radiosity's visibility component to RT cores significantly improves the lightmap generation process and potentially propels it into the domain of real-time.

翻译：照片级真实感图像合成的关键组成部分之一是模拟间接漫反射，这仍然是现代渲染引擎难以克服的根本性障碍。实时应用通常使用辐射度算法离线预生成漫反射光照信息，以避免在运行时执行昂贵的计算。本文提出了一种渐进式改进辐射度算法的变体，该变体利用Nvidia创新的RTX技术加速形状因子计算过程，且不牺牲视觉保真度。通过基于DirectX 12构建的现代实现，我们证明将辐射度的可见性计算任务卸载至RT核心可显著提升光照图生成过程，并有可能将其推进至实时领域。