TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Roth, Thorsten A1 - Weier, Martin A1 - Bauszat, Pablo A1 - Hinkenjann, André A1 - Li, Yongmin T1 - Hash-Based Hierarchical Caching and Layered Filtering for Interactive Previews in Global Illumination Rendering JF - Computers N2 - Modern Monte-Carlo-based rendering systems still suffer from the computational complexity involved in the generation of noise-free images, making it challenging to synthesize interactive previews. We present a framework suited for rendering such previews of static scenes using a caching technique that builds upon a linkless octree. Our approach allows for memory-efficient storage and constant-time lookup to cache diffuse illumination at multiple hitpoints along the traced paths. Non-diffuse surfaces are dealt with in a hybrid way in order to reconstruct view-dependent illumination while maintaining interactive frame rates. By evaluating the visual fidelity against ground truth sequences and by benchmarking, we show that our approach compares well to low-noise path-traced results, but with a greatly reduced computational complexity, allowing for interactive frame rates. This way, our caching technique provides a useful tool for global illumination previews and multi-view rendering. UN - https://nbn-resolving.org/urn:nbn:de:hbz:1044-opus-48359 SN - 2073-431X SS - 2073-431X U6 - https://doi.org/10.3390/computers9010017 DO - https://doi.org/10.3390/computers9010017 N1 - This article belongs to the Special Issue Computer Graphics & Visual Computing (CGVC 2019). VL - 9 IS - 1 SP - 25 S1 - 25 PB - MDPI CY - Basel ER -