Ambient occlusion is a 3D rendering technique that simulates how ambient light is blocked in tight spaces (e.g., corners, crevices, or where objects are close), creating soft, subtle shadows to enhance scene realism.
It mimics natural indirect light occlusion, making 3D scenes look less flat and more grounded. Key uses include 3D modeling, animation, and visual effects, adding depth without relying on harsh direct lighting.
For beginners, testing ambient occlusion in software like Blender with default settings can intuitively show how it improves realism by highlighting subtle shadow details.