LinSSS: linear decomposition of heterogeneous subsurface scattering for real-time screen-space rendering

GenPluSSS: A Genetic Algorithm Based Plugin for Measured Subsurface Scattering Representation

“…The main disadvantage of this approach is that it can't represent heterogeneous translucent materials accurately. [51] suggested a real-time screen-space rendering technique for representing the heterogeneity of subsurface scattering. The proposed technique is called as LinSSS.…”

State of the Art in Efficient Translucent Material Rendering with BSSRDF

“…Since the main reason for isotropy is the 1D radial function $$P_{x}(r)$$, a direct solution is to use the 2D vector $$d=x_{i}-x_{o}$$ instead of $$r$$ (Equation 20) [SW13]. Recently, another approximation has been proposed [YYM20] to represent this anisotropic scattering profile. Following two assumptions that materials are optically thick, and the local profile changes smoothly, Equation (20) can be transformed and further approximated as a weighted sum of Gaussians [dLE07]: $$$$\begin{equation} \begin{aligned} R(x_{i},x_{o})&=\frac{1}{2}(P_{x_{i}}(r)+P_{x_{o}}(r))\\[3pt] &=\frac{1}{2}\sum _{h}w_{x_{i},h}G_{\sigma _{h}}(r)+\frac{1}{2}\sum _{h}w_{x_{o},h}G_{\sigma _{h}}(r).$$…”

“…Since the main reason for isotropy is the 1D radial function P x (r), a direct solution is to use the 2D vector d = x i − x o instead of r (Equation 20) [SW13]. Recently, another approximation has been proposed [YYM20] to represent this anisotropic scattering profile. Following two assumptions that materials are optically thick, and the local profile changes smoothly, Equation (20) can be transformed and further approximated as a weighted sum of Gaussians [dLE07]:…”