Subsurface Scattering Shader 次表面散射着色器Basic 基础Shader 着色器Multiple 多个Single 单身Advanced 高级Lights 灯光
Single Scattering
单次散射
In the following you will find information pertaining to the SubSurface Scattering (SSS) mode Single.
在下面的文章中，你可以找到关于次表面散射模式的信息。
Please note that a light source is required when using Single mode.
请注意，当使用单模式时需要一个光源。
启用
Because Simple SSS works independently from Multiple-SSS it can be enabled or disabled using this option. Simple SSS can also be applied if Multiple SSS is disabled.
因为 Simple SSS 独立于 multiple-SSS 工作，所以可以使用此选项启用或禁用它。如果禁用多个 SSS，也可以应用简单的 SSS。
独立的彩色通道
Only if different path lengths are defined for the three primary colors in the Path Length setting (and ONLY then) will rendering be more precise – taking into account the correspondingly longer render times.
只有在路径长度设置中为三原色定义了不同的路径长度(仅此而已) ，渲染才会更加精确——考虑到相应的较长渲染时间。
追踪阴影射线
Disabling this option speeds up rendering somewhat but will turn off the cast shadow defined for the light sources for a given SSS material.
禁用此选项会在一定程度上加快渲染速度，但会关闭给定 SSS 材质的光源定义的投射阴影。
相位函数[-1. . 1]
Interesting effects can be achieved in conjunction
with a backlight. In this example, both 有趣的效果可以通过背光来实现。在这个例子中，两者都是Multiple 多个 and 及Simple 很简单 SSS modes were used; 采用 SSS 模式;Phase Function 相位函数 was animated
from 是由-1 to 到1.
This setting defines the direction in which the light should be emitted. Negative values will emit the light in the direction opposite the light and positive values will emit the light in the direction in which it shines (in both cases the visual result will be darker). A value of 0 will disperse the light evenly in all directions (also called isotropic dispersion).
这个设置定义了光线发射的方向。负值会反向发光，而正值会反向发光(在这两种情况下，视觉效果都会更暗)。0值将使光均匀地分散到各个方向(也称为各向同性色散)。
Note how less light appears in regions that face away from the light when negative values are used because more light is emitted in the direction of the light source. Positive values will let correspondingly more light through.
请注意，当使用负值时，面向光源的区域的光线是如何减少的，因为更多的光线向光源的方向发射。正值会相应地让更多的光线通过。
Values of exactly -1 and 1 will turn Simple SSS off.
精确 -1和1的值将关闭简单的 SSS。
Custom Sampling
Sampling Subdivision[0..16]
自定义采样细分[0. . 16]
For the Physical Renderer, this option will normally be applied globally for the Project in the Subsurface Scattering Subdivision (Max) settings.
对于物理渲染器，这个选项通常应用于项目的全局次表面散射/最大细分(Max)设置。
Enable the Custom Sampling option if you want to define this parameter for a specific material or object and use the Sampling value to define the amount of noise with which Simple SSS should be rendered. Higher values will result in better quality (and correspondingly longer render times) and vice-versa.
如果您希望为特定的材质或对象定义此参数，并使用 Sampling 值定义用于显示简单 SSS 的噪声量，则启用 Custom Sampling 选项。更高的值将导致更好的质量(相应地更长的渲染时间) ，反之亦然。
For the default renderer (which has no such global setting), sampling can only be defined in the material itself.
对于默认的渲染器(没有这样的全局设置) ，采样只能在材质本身中定义。
More information about this setting can be found under Subsurface Scattering Subdivision (Max).
关于这个设置的更多信息可以在次表面散射细分(Max)下找到。