---
title: "V-Ray Material Diffuse"
canonical: "https://documentation.chaos.com/space/VC4D/116856323/V-Ray%20Material%20Diffuse"
format: markdown
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The Diffuse tab is part of the V-Ray Material parameters.


## **Shading Model**

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## **Diffuse**

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> Macro (anchor)



### **Example: Diffuse Roughness**


This example demonstrates the effect of the **Roughness** parameter. Note how, as the **Roughness** increases, the material appears more "flat" and dusty.

![image](media://7ee18507-06a3-47a7-8f27-670dcb993502)

**Roughness **= 0.9

![image](media://eb39a97a-946e-454a-b4de-7d36ed4faa80)

**Roughness **= 1.0

## **Opacity**

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## **Self-Illumination**

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