|Description:||Overcast lighting (indirect lighting / shadowing) (1 = light; 0 = shadow)|
2 What is ambient occlusion?
Ambient occlusion represents non-directional shadowing of a scene / asset like overcast lighting.
3 How do we get this result in realtime?
3.1 Screen space ambient occlusion
Screen space ambient occlusion is the indrectional shadowing of the raw geometry of a scene. It's a screen space post processing effect of the engine, procedurally generated. The detail amount depents on the raw geometry.
=== Ambient occlusion map ===
With screen space ambient occlusion there are no indirect shadows in surface details. For that we need ambient occlusion information texture based. The resolution is an ambient occlusion map.
YouTube list "bake + ambient + occlusion + from + highpoly"
Bake ambient occlusion maps