Z-depth in 3D rendering is the distance of objects from the camera along the z-axis, determining their depth position in a scene.
It’s critical for calculating object occlusion: closer objects visually block farther ones, which is key to creating realistic depth perception.
Rendering engines often use z-depth data stored in a depth buffer to automatically manage scene layering, ensuring correct visual order.
When adjusting 3D scene spatial relationships, checking z-depth values helps maintain proper visual hierarchy without manual repositioning, ensuring accurate depth representation.