Fast, Non-Physical Subsurface Scattering

The Fast subsurface scattering shaders do not simulate true volumetric scattering. Instead, they simulate the appearance of scattering. While the physical shader may be accurate, it can be difficult to understand intuitively, hard to tune, and time-consuming to render.

The misss_fast_* set of shaders are provided as an alternative. These shaders make no real attempt to simulate reality. Instead, their goal is to make a reasonable, visually pleasing, easy to use, consistent looking result that is free of artifacts, and have good frame-to-frame coherence (no flickering). One of the design goals of these shaders is to provide a way to efficiently render human skin.

The shaders are wrapped up into two simple Phenomena, which are built from a set of component shaders.

Type	name	page
Phenomena	misss_fast_simple_phen	misss_fast_simple_phen
	misss_fast_skin_phen	misss_fast_skin_phen
	misss_fast_skin_phen_d	misss_fast_skin_phen_d

Shaders	misss_fast_shader	misss_fast_shader
	misss_lightmap_write	misss_lightmap_write
	misss_lambert_gamma	misss_lambert_gamma
	misss_skin_specular	misss_skin_specular
	misss_call_shader	misss_call_shader

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