Demo example

• Screen Space Ambient Occlusion (SSAO), see also SSAOShader.js
  • http://john-chapman-graphics.blogspot.com/2013/01/ssao-tutorial.html
  • https://learnopengl.com/Advanced-Lighting/SSAO
  • https://creativecoding.soe.ucsc.edu/courses/cmpm164/_schedule/AmbientOcclusion.pdf
  • https://github.com/McNopper/OpenGL/blob/master/Example28/shader/ssao.frag.glsl
  • https://drive.google.com/file/d/1SyagcEVplIm2KkRD3WQYSO9O0Iyi1hfy/edit
• Scalable Ambient Occlusion (SAO), see also SAOShader.js
  • https://casual-effects.com/research/McGuire2012SAO/index.html
  • https://research.nvidia.com/sites/default/files/pubs/2012-06_Scalable-Ambient-Obscurance/McGuire12SAO.pdf
• N8HO
  • https://github.com/N8python/n8ao
• Horizon Based Ambient Occlusion (HBAO)
  • http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.577.2286&rep=rep1&type=pdf
  • https://www.derschmale.com/2013/12/20/an-alternative-implementation-for-hbao-2/
  • https://github.com/scanberg/hbao/blob/master/resources/shaders/hbao_frag.glsl
  • https://github.com/nvpro-samples/gl_ssao/blob/master/hbao.frag.glsl
• GTAO
  • https://iryoku.com/downloads/Practical-Realtime-Strategies-for-Accurate-Indirect-Occlusion.pdf
  • https://github.com/GameTechDev/XeGTAO#xegtao
  • https://github.com/asylum2010/Asylum_Tutorials/blob/master/Media/ShadersGL/gtao.frag
• further reading
  • https://ceur-ws.org/Vol-3027/paper5.pdf
  • https://www.comp.nus.edu.sg/~lowkl/publications/mssao_visual_computer_2012.pdf
  • https://web.ics.purdue.edu/~tmcgraw/papers/mcgraw-ao-2008.pdf
  • https://www.activision.com/cdn/research/Practical_Real_Time_Strategies_for_Accurate_Indirect_Occlusion_NEW%20VERSION_COLOR.pdf
  • https://patapom.com/blog/SHPortal/
  • https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.390.2463&rep=rep1&type=pdf
  • https://www.intel.com/content/www/us/en/developer/articles/technical/adaptive-screen-space-ambient-occlusion.html
  • https://github.com/GameTechDev/ASSAO