How does ambient occlusion affect 3D visual quality?

Ambient occlusion enhances 3D visual quality by simulating ambient light blockage in tight spaces between objects, boosting realism and depth perception. It darkens areas where surfaces are close—such as crevices, corners, or overlapping parts—helping viewers naturally perceive spatial relationships. This effect makes 3D scenes look more three-dimensional without complex lighting setups, as details like object intersections or recessed areas appear lifelike. Overall, ambient occlusion is key for creating immersive, realistic 3D visuals in games, animations, and renders.