OpenGL - SSAO (screen space ambient occlusion) 

9:03 I´m currently replaying Far Cry 3 and I noticed that outline around characters and objects. Now I know why it´s there. Thank you very much!

I'm glad I could find a video explaining what exactly SSAO is and what it does and what the difference in with and without it is/looks like. (I had to know for in-game graphics settings if I need/want it) Thumbs up. PS: Nice voice btw.

Ambient occlusion is like the drop shadow of 3D lighting.

Thanks Brian. Excellent 👌

Thanks! I came here only looking for general idea of SSAO, and diagram helped me a lot!

great explanation, thanks!

Thank you for this clear explaination :>

THANKK YOUUU SO MUUUCH

You have a nice voice ... I put the "OOP is bad" video on speaker ... Best one for kicker speakers ....

Your way of generating a random vector inside a hemisphere doesn't produce a uniform distribution, since the probability around the four "corners" (±1, ±1, 1) is higher than in other areas. A better way would be to use rejection sampling: instead of normalizing the vector & making a random length, just check if it is inside the hemisphere, otherwise generate a new vector, and so on. This way, the distribution would be uniform.

Thank you so much for this video

Ambient occlusion is a good approximation for situations where direct illumination is not present. But then in the real world nothing really distinguishes an "emitted" light ray from a "reflected" light ray. But where a strong light is not present and where textures are less reflective, the lights get bounced in multiple directions the more light that gets sent in multiple directions either through diffuse reflection, or refraction, the more that light will appear like what we think of as "ambient" lighting

nice playlist

I am trying some OpenGL for the firsf time and 2 days ago 95% of this code would have been very confusing. I will try this later for sure. Thanks!

@Brian Will, I apologize for commenting 3 years so late, but is it possible to do a follow up on the improved SSAO called HBAO+? (Horizontal Based Ambient Occlusion? I read this on Nvidia papers, and they confirmed its better than SSAO in every way and even 3x more efficient?

wait ao is the number of samples that are occluded from point of view ?

A g8t explanation

hey can you make some reshade filters ????? that do this

Just two words: CACHE EFFICIENCY. Not a good idea to use whole gbuffer for random texture reads. Use 16bit depth buffer (reduced at least in half ) and restore position in any space you want. It would have much better performance. Just saying.

Are two pictures on right real? I mean last ten seconds of video

Looks hardy any diffrent