“Real-Time Ray-Traced Ambient Occlusion of Complex Scenes using Spatial Hashing” by Pascal Gautron

  • ©Pascal Gautron

Conference:


Title:

    Real-Time Ray-Traced Ambient Occlusion of Complex Scenes using Spatial Hashing

Presenter(s):


Project Affiliation:


    NVIDIA

Abstract:


    Ambient occlusion is often approximated in real-time using screen-space techniques, leading to visible artifacts. Raytracing provides a unique way to increase the rendering fidelity by accurately sampling the distance to the surrounding objects, but it introduces sampling noise. We propose a real-time ray-traced ambient occlusion technique in which noise is filtered in world space. Using extended spatial hashing for efficient storage, multiresolution AO evaluation and ad-hoc filtering, we demonstrate the usability of our technique as a production feature usable in CAD viewports with scenes comprising hundreds of millions of polygons.


ACM Digital Library Publication:



Type: