@unpublished{RothWeierBauszatetal.2020, author = {Thorsten Roth and Martin Weier and Pablo Bauszat and Andr{\´e} Hinkenjann and Yongmin Li}, title = {Hash-Based Hierarchical Caching and Layered Filtering for Interactive Previews in Global Illumination Rendering}, institution = {Fachbereich Informatik}, year = {2020}, abstract = {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.}, language = {en} }