I started looking at techniques for simulating volumetric subsurface scattering at mit in 1998.
Subsurface scattering marble.
All non metallic materials are translucent to some degree.
Subsurface scattering works by simulating how light penetrates a translucent surface like a grape for instance and is absorbed and scattered and exits the surface at a different location.
This phenomenon is called subsurface scattering.
Lambert m surhone miriam t timpledon.
If subsurface scattering is not implemented the material may look unnatural like plastic or metal.
Subsurface scattering is important for realistic 3d computer graphics being necessary for the rendering of materials such as marble skin leaves wax and milk.
Skin milk marble and wax are the materials which most commonly owe their look to sss although this is an optical phenomenon that is present in virtually all non metallic materials.
Light scattering 3d computer graphics marble real time computer graphics shadow mapping.