Roth, ThorstenWeier, MartinBauszat, PabloHinkenjann, AndréLi, YongminVidal, Franck P. and Tam, Gary K. L. and Roberts, Jonathan C.2019-09-112019-09-112019978-3-03868-096-3https://doi.org/10.2312/cgvc.20191261https://diglib.eg.org:443/handle/10.2312/cgvc20191261Modern 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.Computing methodologiesComputer graphicsRay tracingImagebased rendering10.2312/cgvc.2019126185-93