BRDF Rollout Menu finalRender Stage-1 supports through its fR-Architecture material a reflectance model called bidirectional reflectance distribution function. It implements an effect that is known as Fresnel Effect (pronounced “frenel” - the “s” is silent). This visual effect is based on the observations that the amount of reflectance you see on a surface depends on the viewing angle. By turning on this checkbox, you alter how the reflections in the material are created as shown below. 双向反射分布功能（BRDF）。一个用于定义物体表面的光谱和空间反射特性的功能。又名－毕奥定向反射分配函数(BRDF)的使用来表示一表面的反射属性。一个函数定义一个表面的光谱和空间反射属性。 Remember that when Fresnel is turned on, the strength of the reflection will increase as the angle of the object’s surface becomes greater to the viewing angle. 此选项打开，反射强度将随视线和物体表面夹角的增大而增强。（如现实中所呈现，夹角范围0°~90°） NOTE: This checkbox is also linked to the Refraction group of control’s Fresnel checkbox as well, and when one is off, they both are turned off. 注意：这里的选项和折射面板里的菲涅耳fresnel选项关联，同步开关。 The Fresnel Effect was first documented by the French physicist Augustin-Jean Fresnel in the 18th century, who advanced the wave theory of light through a study of how light was transmitted and propagated by different objects. （关于菲涅耳他老人家及其理论的简介） By IOR (fresnel reflections) - uses a fixed reflection curve based on the angle of view and its strength is controlled by the material’s index of refraction. 依照折射率（菲涅耳反射）使用一个依据观察角度计算的反射折射，其数值大小依据物质折射率。 Custom Reflectivity Function - check this option, to specify a custom curve for the reflection strength based on the angle of view. 手动调节反射效果－勾选将指定用户自定义曲线来调节反射。 0 deg. refl. - sets the reflectivity strength for surfaces directly facing the viewer (or incident ray). 0° 设置和视角同角度的反射，或者随机产生的光线。 90 deg. refl. - controls the reflectivity of surfaces perpendicular to the viewer. 90°反射 控制与视线垂直的表面的反射。 Curve shape - is used to define the falloff of the BRDF curve. 曲线弧度 － 通常被用作定义BRDF的效应消散范围。 Note: The custom curve, can easily be used to create metallic effects or wet looking materials. 手动调节能容易的创建出细腻金属质感和表面潮湿效果的材质。

———————————————

http://heixing.net

-=[finalRender 3d渲染]=-

———————————————