Originally Posted by Dridzt
It means Screen Space Ambient Occlusion (SSAO).
It has to do with lighting and is probably another way to kill our framerate for marginal visual benefit :P
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According to the code, it seems to be set to a lower value the higher your settings are (low = 2, high = 1).
https://github.com/p3lim/wow-ui-sour...s.lua#L703-730