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Roughness Property (IDSPBRMaterial)

Gets or sets the specular spread (roughness) of the appearance.

.NET Syntax

Visual Basic (Declaration) 
Property Roughness As System.Double
Visual Basic (Usage) 
Dim instance As IDSPBRMaterial
Dim value As System.Double
 
instance.Roughness = value
 
value = instance.Roughness
C# 
System.double Roughness {get; set;}
C++/CLI 
property System.double Roughness {
   System.double get();
   void set ( &   System.double value);
}

Property Value

0.0 (default) <= Specular spread <= 1.0

Remarks

This property controls the size of any highlights on a surface. It is also known as the specular exponent. Increasing roughness makes highlights larger and softer.

 

The specular value must not be zero, the specular tint color must not be black, and at least one light other than an ambient light must be illuminating the model.

 

For more information about this property:

  • Open https://dassaultsystemes-technology.github.io/EnterprisePBRShadingModel/spec-2025x.md.html in an internet browser, click CTRL-F and type "Roughness" in the pop up. Click Next result repeatedly.
  • Search for "roughness in materials" on the web.

See Also

Availability

SOLIDWORKS 2026 FCS, Revision Number 34


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10.20.6