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GLSL ShadingTuesday, November 20, 2012. Screen Space Ambient Occlusion. Implemented screen space ambient occlusion using 3 different techniques. Used the Sponza scene to display the effects. Regular Grid AO - Difference. In this case random points within a sphere were used to determine how much is the occlusion. The points were rotated by a random value for each pixel, to reduce artifacts. Poisson Sphere (Rotated for randomness). Poisson Sphere (Rotated for randomness) - Difference. World Space Poisson Sphere:.
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