Computer Graphics & Visual Computing (CGVC) 2019

Permanent URI for this collection

Now showing 1 - 1 of 1

Hash-based Hierarchical Caching for Interactive Previews in Global Illumination Rendering
(The Eurographics Association, 2019) Roth, Thorsten; Weier, Martin; Bauszat, Pablo; Hinkenjann, André; Li, Yongmin; Vidal, Franck P. and Tam, Gary K. L. and Roberts, Jonathan C.
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.