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 thousands of instances and hundreds of millions of polygons.
#SIGGRAPH #raytracing #NVIDIA #RTX
20 сен 2020
