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The Subsurface Scattering material settings are organized in Basic and Advanced modes. You can switch the mode from the toggle button under the Preview Swatch or globally from the Configuration rollout of the Settings tab.

From the Add Attribute button,you can select additional attributes that can add up to the appearance of the material. For more information, see theAdd Attributesection.

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Holding down Ctrl while having the Add Attribute menu open, allows selecting multiple entries without closing the dropdown.

The context menu of the Color slot provides options to Copy, Paste, and Reset the color.

A Reset option is provided in the context menu of each Number Slider. You can reset the slider value to the default one.

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Parameters

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Some of the parameters are available only in Advanced mode.

Scale –Additionally scales the subsurface scattering radius. Normally, Subsurface Scattering takes the scene units into account when calculating the subsurface scattering effect. However, if the scene was not modeled to scale, this parameter can be used to adjust the effect. For more information, see the Scale example below.

Index of Refraction  – Specifies the index of refraction for the material. Most water-based materials like skin have IOR of about 1.3.

Overall Color – Controls the overall coloration of the material. This color serves as a filter for both the diffuse and the sub-surface component.

Opacity – Specifies how opaque or transparent the material is.

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This rollout is available only in Advanced mode.

Mode – Specifies one of the following methods for adjusting textures.

Multiply – Multipliers can be specified to adjust colors and textures.
Blend Amount – Blend amounts can be specified to adjust colors and textures.

Opacity – Controls the intensity of the Opacity value, which determines how opaque or transparent the overall material is.

Overall Color – Controls the intensity of the material's Overall Color.

Diffuse Color – Controls the intensity of the material's diffuse color.

Diffuse Amount – Blends between a texture assigned (if such) and a color. 

Sub-Surface Color – Controls the intensity of the material's sub-surface color.

Scatter Color – Controls the intensity of the internal scattering color.

Specular Color – Controls the intensity of the material's specular color.

Specular Glossiness – Controls the sharpness intensity of the material's specular highlights, which affects the highlight shape.

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Viewport Display

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Viewport Texture

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The selected texture is displayed in the

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viewport

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Keep in mind that procedural textures are not shown in the viewport, however, any Bitmap textures, including ones nested in procedurals, will be automatically displayed.

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Override Control

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Can be Overridden – When enabled, the material can be overridden by the Material Override option in the Settings.

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