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title: "V-Ray Sun"
canonical: "https://documentation.chaos.com/space/VREVIT/161972451/V-Ray%20Sun"
format: markdown
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This page provides details on using the Sun system available in V-Ray for Revit.

 

## **Overview**

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## **UI Path**

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## **Parameters**

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### ** Sky**

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#### **Stars**

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### **Example: Stars Direct mult**

The **Direct Light **parameter controls the brightness of the stars in this example.


#### **Moon**

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### **Example: Moon Direct mult**

The **Direct mult. **parameter controls the brightness of the moon in this example.



###  **Ground Albedo**

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### **Clouds**

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### **Example: Ground Shadows **

This example shows the effect of the Ground Shadows option.


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### **Example: Density**

The Density parameter controls the amount of clouds in the sky. The higher the value, the higher the amount of clouds appearing in the render.



 

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### **Contrails**

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### **Example: Number**

Note that the contrails are spread randomly across the sky. In most cases, the camera does not capture all of the contrails.



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### **Example: Distortion**

The Contrails distortion parameter is used to achieve some variety in the trace line. 



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### **Dynamic Clouds**

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### **Background**

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