@Sharpe2603. I don’t know if it makes a difference but before I turned AO to HIGH, I had Texture Supersampling upped to 4x4 and Texture Synthesis set to HIGH. So maybe I’m enthused about the combined effect of better rendered and better lit/shaded surfaces both inside and outside the plane. I found all combined made a particular difference looking at textures and shapes inside the cockpit (see CptLucky8’s remarks about cockpit effects for AO).
Here’s an example of AO illustrated in 2D: https://forums.flightsimulator.com/t/ambient-occlusion-thing/201837/2?u=jalxml
Here’s an enthused remark from someone who flies with AO on Ultra with a 2080Ti: VR Mode, a lot to wish for - #35 by HURCN30
As CptLucky8 remarked, if you fly over NYC (2D might be easier than 3D), AO should show in reflections and shadows between buildings in the skyscraper canyons and I’ve remarked that I can see the same thing flying amongst real canyons formed by mountain skyscrapers in Mann Gulch, MT, and Machu Picchu, Peru: Bake Ambient Occlusion in the cockpit when Ambient Occlusion is disabled - #14 by JALxml