Subsurface scattering enhances the realism of 3D materials by simulating how light penetrates, scatters internally, and exits translucent or semi-transparent surfaces, mirroring natural light behavior.
It is critical for materials like human skin, wax, marble, or milk: unlike surface-only reflection, light travels through these materials, creating soft color gradients, subtle color bleeding, and a lifelike "glow" that makes the material appear more natural.
For 3D artists, adjusting subsurface scattering parameters (e.g., scatter distance, color) in rendering tools helps achieve authentic, lifelike material appearances, elevating overall visual realism.