金属 BSDF

金属 BSDF 节点用于再现金属的外观。

输入

F82 色调

基础色

Color of the material when viewed straight on.

边缘染色

Color of the material when viewed at a 82° angle.

物理导体

IOR

Refractive index per color channel. This is the real part of a complex refractive index, scientifically denoted as n.

消光

Extinction coefficients per color channel. This is the imaginary part of a complex refractive index, scientifically denoted as k.

通用选项

粗糙度

反射的锐利度；值为 0.0 时非常锐利，值越高越平滑。

各向异性 仅限 Cycles

Amount of anisotropy. Higher values give elongated highlights along the tangent direction; negative values give highlights shaped perpendicular to the tangent direction.

旋转 仅限 Cycles

旋转各向异性的方向，取值 1.0 表示旋转一整圈。

Compared to the Glossy BSDF node, the direction of highlight elongation is rotated by 90°. Add 0.25 to the value to correct.

法向

用于着色的法向；如果没有连接其它选项，则使用默认着色法向。

切向 (正切)

切线右用于着色；如果没有连接其它选项，则使用默认着色切线。

属性

分布

要使用的微面分布。

• GGX:

  GGX微平面分布。

  多重散射GGX:

  Takes multiple scattering events between microfacets into account. This gives more energy conserving results, which would otherwise be visible as excessive darkening.

  贝克曼:

  仅限 Cycles 贝克曼微面分布。

菲涅尔类型

Models for describing the metal’s appearance, by specifying the apparent color or the physical IOR.

• F82 色调:

  Uses the Adobe F82-Tint formula for the metallic fresnel. This allows for artist friendly control of the color near the edge of the material to simulate a complex IOR.

  物理导体:

  Accepts Complex IOR measurements from real world metals to replicate a more accurate rendering of metals than the F82 Tint Fresnel type.

  Complex IOR values can be found from sources like the Physically Based database for CG artists and Refractive Index nk database.

输出

BSDF

标准着色器输出。

示例

F82 色调

材质	钛（默认）	铝	铜	金
基础色	0.617, 0.576, 0.540	0.911, 0.912, 0.917	0.972, 0.694, 0.486	1.000, 0.735, 0.353
边缘染色	0.695, 0.726, 0.770	0.848, 0.877, 0.916	0.961, 0.969, 0.942	0.993, 1.000, 1.000

物理导体

材质	钛（默认）	铝	铜	金
IOR	2.757, 2.512, 2.231	1.333, 0.945, 0.582	0.235, 0.729, 1.369	0.000, 0.470, 1.439
消光	3.867, 3.404, 3.009	7.434, 6.340, 5.181	5.666, 2.562, 2.227	182.6, 2.189, 1.660