Principled Hair 原理化毛发
Introdution
介绍
The Redshift Principled Hair shader is a physically-based shader for hair and fur. You can quickly get up to speed with natural hair results by adjusting the melanin/melanin redness values and adding in some randomization by increasing the amount of variation for various color and roughness parameters.
红移原则的头发着色器是一个物理的头发和毛皮着色器。你可以通过调整黑色素/黑色素的红色值，增加一些随机化，增加各种颜色和粗糙度参数的变化量，快速达到自然头发的效果。
Cinema4D Principled Hair Parameters
4 d 原则发型参数
General
将军
Tint
淡色
This allows you to tint the color of the hair. The default white color allows the full melanin and other color attributes to show through unaffected.
这样你就可以给头发染色。默认的白色允许充分的黑色素和其他颜色属性显示通过未受影响。
Tint color breaks physical accuracy and should be left at the default color white for realistic hair so the specular highlights are not colored. To simulate dyed hair or other colors outside of the melanin color range and maintain physical accuracy please use albedo color instead.
色彩打破了物理准确性，并应留在默认的颜色白色现实的头发，以便镜面高光是不着色。为了模拟染色的头发或其他颜色以外的黑色素颜色范围和保持物理准确性，请使用反照率颜色代替。
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Tint: White (Default) 淡色: 白色(默认) Melanin: 0.65 黑色素: 0.65 |
Light Green 浅绿色 | Magenta 洋红色 |
Roughness
粗糙度
Roughness controls how shiny the hair looks by tightening or spreading the reflection highlights along the length of the hair strands. Higher values result in more spread out diffuse reflections while lower values result in tighter more shiny highlights.
粗糙度控制如何光泽的头发看起来通过紧缩或散布的反射沿着发丝的长度突出。较高的值导致更多的扩散漫反射，而较低的值导致更紧密的光泽突出。
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Roughness: 0.005 粗糙度: 0.005 |
0.1 | 0.3 (Default) 0.3(默认值) | 0.5 | 1.0 |
Roughness (radial)
粗糙度(径向)
Roughness radial controls how shiny the hair looks by tightening or spreading the reflection highlights across the width of the hair strands. Higher values result in more spread out diffuse reflections while lower values result in tighter more shiny highlights.
粗糙径向控制如何发光的头发看起来通过紧缩或散布的反射突出整个发丝的宽度。较高的值导致更多的扩散漫反射，而较低的值导致更紧密的光泽突出。
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Roughness (radial: 0.005 粗糙度(径向: 0.005 |
0.1 | 0.3 (Default) 0.3(默认值) | 0.5 | 1.0 |
Angle Shift
角度转换
Angle Shift moves the location of the highlights along the hair strands. Positive values shift the highlight position towards the root of the hair strands and negative values shift the highlight towards the tip.
角移动的位置移动沿着发丝的亮点。积极的价值转移突出位置朝向发根线和负面的价值转移突出朝向提示。
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Angle Shift: -15 角度转换:-15 |
-7 - 7 |
3 (Default) 3(预设) | 7 | 15 |
IOR
返回抑制
This allows you to adjust the index of refraction, human hair has an IOR of 1.55. Higher values increase reflectivity.
这样你就可以调整头发的折射率，人类头发的返回抑制值为1.55，更高的反射率会更高。
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IOR: 1.0 1.0 |
1.25 | 1.55 (Default) 1.55(预设值) | 1.75 | 2.0 |
Samples
样本
This defines the number of samples to use when rendering the hair, more samples means less noise. Lower hair roughness values produces sharper light reflections which will require using higher sample counts.
这定义了渲染头发时要使用的样本数量，更多的样本意味着更少的噪音。较低的头发粗糙度值产生更清晰的光反射，这将需要使用更高的样品计数。
Color
颜色
Albedo Mix
反照率混合
This controls how heavily the albedo color is mixed with the melanin color.
这控制着反照率的颜色和黑色素的混合程度。
Melanin color affects the result of the albedo color mix by darkening it when melanin is set above 0. For an albedo only color make sure melanin is set to 0.
当黑色素设置在0以上时，黑色素的颜色会变暗，从而影响反照率混合色的结果。对于一个反照率只有颜色确保黑色素设置为0。
Albedo
反照率
Albedo controls the color of the hair.
反照率控制头发的颜色。
It is recommended to use the melanin/melanin redness color attributes instead of the albedo if your intention is to simulate natural real-world hair colors.
如果你的目的是模拟真实世界中自然的头发颜色，建议使用黑色素/黑色素红色属性代替反照率。
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Albedo Mix: 0.0 反照率混合: 0.0 Albedo: Orange (default) 反照率: 橙色(默认值) Melanin: 0.65 黑色素: 0.65 |
0.5 Orange (default) 橙色(默认值) 0.65 |
1.0 Orange (default) 橙色(默认值) 0.65 |
0.5 Blue (0,0,255) 蓝色(0,0,255) 0.2 |
0.5 Blue (0,0,255) 蓝色(0,0,255) 0.65 |
1.0 Hair Position + Color Ramp 头发位置 + 颜色斜坡 0.65 |
Melanin
黑色素
This defines the concentration of melanin in the hair where higher values result in darker hair. A value of 0 will render the hair completely white.
这就决定了头发中黑色素的浓度，高浓度的黑色素会导致头发颜色变深。值为0将使头发完全变白。
Lighter colored hair benefits greatly from increasing the rendering trace depth so be certain to check reflection trace depth particularly for blonde hairstyles.
浅色头发可以大大提高渲染痕迹深度，所以一定要检查反射痕迹深度，特别是对于金发发型。
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Melanin: 0.0 黑素: 0.0 |
0.25 | 0.5 | 0.75 | 1.0 |
Melanin Redness
黑色素红
This defines the redness of the hair color by controlling the amount of pheomelanin in the hair. Higher melanin redness values will result in redder hair as long as the melanin value is set higher than 0.
这通过控制头发中酚黑素的含量来确定头发的红色。只要黑色素值设定在0以上，较高的红色值会导致头发变红。
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Melanin Redness: 0.0 黑色素红: 0.0 Melanin: 0.3 黑色素: 0.3 |
0.25 | 0.5 | 0.75 | 1.0 |
Variation
变化
Variation Seed
变异种子
Changing the variation seed value lets you quickly alter the results of any of the random variation attributes.
通过更改变异种子值，可以快速更改任何随机变异属性的结果。
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Variation Seed: 0 变异种子: 0 |
1 | 2 |
Glint Size
闪烁大小
This controls the size of the reflection breakup on the hair.
这控制了头发上反射分裂的大小。
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Glint Size: 4 闪烁大小: 4 |
16 | 64 | 256 | 1024 |
Glint Strength
闪烁强度
This controls the intensity of the reflection breakup on the hair. Higher values result in more intense
这控制了头发反射分裂的强度，更高的值会导致更强烈的分裂
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Glint Strength: 0.0 闪烁强度: 0.0 |
0.25 | 0.5 | 0.75 | 1.0 |
Stray Hair Albedo
散落的头发反照率
This controls the albedo color of the stray hairs.
这控制着散落的头发的反照率颜色。
Stray Hair Fraction must be set above 0.
游离毛发分数必须设置在0以上。
Stray Hair Fraction
游离毛发
This controls the ratio of normal hairs to stray hairs that use the stray hair albedo color. A value of 0 results in no stray hairs and higher numbers result in more stray hairs.
这控制了正常头发与使用散乱头发反照率颜色的散乱头发的比例。数值为0时没有杂散毛发，数值越大则杂散毛发越多。
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Stray Hair Fraction: 0.0 零散毛发分数: 0.0 Stray Hair Albedo: White 散落的头发反照率: 白色 |
0.33 White 白色 |
0.66 White 白色 |
1.0 White 白色 |
0.2 Magenta 洋红色 |
Melanin Var.
黑色素变种
Melanin variation randomizes the amount of melanin concentrated in the hair strands. Higher numbers increase the amount of melanin variation.
黑色素随机变化的数量黑色素集中在发丝。更高的数量增加黑色素变化的数量。
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Melanin Var: 0.0 黑色素变种: 0.0 |
0.25 | 0.5 | 0.75 | 1.0 |
Melanin Redness Var.
黑色素红变种
Melanin redness variation randomizes the amount of melanin redness found in the hair strands. Higher numbers increase the amount of melanin redness variation.
发丝中的黑色素随机变化。较高的数量增加的数量的黑色素发红变异。
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Melaness Redness Var: 0.0 无色红变量: 0.0 |
0.25 | 0.5 | 0.75 | 1.0 |
Roughness Var.
粗糙度变量
Roughness variation randomizes the amount of reflection roughness on the hair.
粗糙度随机变化的数额反射粗糙度对头发。
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Roughness Var: 0.0 粗糙度值: 0.0 |
0.5 | 0.75 | 1.0 |
Roughness (radial) Var.
粗糙度(径向)变量
Roughness radial variation randomizes the amount of reflection radial roughness on the hair.
粗糙度径向变化随机数量的反射径向粗糙度的头发。
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Roughness (radial) Var: 0.0 粗糙度(径向)变量: 0.0 |
0.5 | 0.75 | 1.0 |
Diffuse Contribution
漫反射贡献
Diffuse Amount
扩散量
This controls how diffuse the hair is and uses the diffuse albedo color.
这控制如何漫反射的头发是，并使用漫反射颜色。
Real hair or fur does not have a diffuse component however increasing diffuse amount can be helpful when simulating dirty/damaged hair or other fibers that are not translucent. For the most realistic hair diffuse amount should be set to 0.
真正的头发或毛皮没有漫反射的成分，但是增加漫反射的数量在模拟脏的或损坏的头发或其他不是半透明的纤维时是有帮助的。对于最现实的头发漫射量应该设置为0。
Diffuse Albedo
漫反照率
This controls the diffuse color of the hair when diffuse amount is set above 0.
这控制漫反射的头发颜色时，漫反射数额设置为0以上。
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Diffuse Amount: 0.0 扩散量: 0.0 Diffuse Albedo: White 漫反照率: 白色 |
0.01 White 白色 |
0.1 White 白色 |
1.0 White 白色 |
0.01 Light Green 浅绿色 |
Additional methods of controlling hair color
控制头发颜色的其他方法
Coming Soon
即将上市
Hair rendering and trace depth
头发渲染和痕迹深度
Coming Soon
即将上市
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