Light directionality in 3D models is critical for enhancing visual realism and spatial perception by shaping shadows, highlights, and surface details.
- Reveals surface details: Directs light to emphasize texture variations, making flat or simple surfaces appear layered and lifelike. - Creates spatial depth: Contrasts light and shadow on convex/concave areas, helping viewers distinguish depth and form. - Boosts realism: Mimics natural light behavior, aligning 3D models with real-world visual logic for a coherent, immersive look.