Ambient Occlusion

Ambient Occlusion is how exposed each point in a scene is to ambient lighting. It's effect is that it darkens darkens enclosed and sheltered areas of the scene.

VXAO (Voxel Ambient Occlusion ) - 2016

NVIDIA HBAO+ - 2013

Scalable Ambient Obscurance - 2012

HDAO (High Definition Ambient Occlusion) - 2009

HBAO (Image-Space Horizon-Based Ambient Occlusion) - 2008

SSAO (Screen Space Ambient Occlusion) - 2007

Each full screen pass sample the depth around each pixel and a darkening value is computed based on depth differences. Sampling is done randomly in a sphere around each pixel.

Accessibility Shading - 2002

Large Scale Ambient Occlusion: Eliminating light leaks - 2018

https://www.dsdambuster.com/blog/lsao-part-2

Large scale ambient occlusion: introduction

Study Notes: Improved Ambient Occlusion

Scalable Ambient Obscurance for the Mathematically Uninclined - 2019

Local linear models and guided filtering – an alternative to bilateral filter

https://bartwronski.com/2019/09/22/local-linear-models-guided-filter/

Ambient Occlusion

https://docs.google.com/presentation/d/1rVb2bW2EC-XQjOoN4hvXB-5aIO8H5vd2diKXw1ldAE0/edit#slide=id.p