Sub-Surface Scattering.
Chromatic aberration in refraction.
Raytraced colour aberations based on the thickness of transparent surfaces.
Caustics per surface. (can use it for soft shadow)
Radiosity per surface.
New/unique specular algorithm.
Simple fresnel.
Soft reflection.
Soft refraction.
UV map based normal ray displacement.
Diffusion curve adjustment.
Transparency amout of undercoat of fuzzy materials (woolen sweater for example).
Designation of a color in a ray trace limit.
Multilayered specular.
Volumetric texture.
Three kinds of special light of OGO_Hikari exclusive use.