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This page provides information about the Override material in V-Ray for Rhino.

 


Overview

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The Override Material is a utility material provided with the V-Ray renderer. It allows a surface to look different depending on whether it is seen through reflections, refractions, or GI. With this material you can get fine control over the color bleeding, reflections, refractions, and shadows of the objects.

 
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Image by Linda Ferroni demonstrating the reflect material override option.

 

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UI Paths

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||V-Ray Asset Editor|| > Materials (right-click) > Override

||V-Ray Asset Editor|| > Create Asset (left-click) > Materials > Override

 

 



Parameters

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Base Material – The material V-Ray uses while rendering the object.  

Shadows – The material that V-Ray uses to render shadows cast from the object.

Reflection – The material V-Ray uses to render the object with when the object is seen in reflections. For more information, see Using the Reflect Material example below.

Refraction – The material V-Ray uses to render the object with when the object is seen in refractions. For more information, see Using the Refract Material example below.

GI – The material V-Ray uses when calculating the GI solution. For more information, see Using the GI Material example below.

Environment – The texture that V-Ray uses instead of the scene environment maps for this specific material.

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GIExample
GIExample
 

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Example: Using the GI Material Override

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This example shows how the use of a GI material override affects the rendering.


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Before after
afterLabelwith GI
darktrue
beforeLabelwithout GI
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borderStylenone

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borderStylenone

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This simple interior scene represents a room lit by two rectangle VRayLights - one hidden top light and another back fill light - as well as by three disc VRayLights for the pendant lamps above the sinks.

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beforeLabeloff
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borderStylenone

 

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usingTheRefractMaterial
usingTheRefractMaterial
 

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Example: Using the Refract Material Override

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The next render is even more complex as the Override Refract Material of the boxes is activated as well. From left to right follow: a cyan, a purple and a yellow diffuse color. Those materials are set so that when seen through refraction, V-Ray will consider and render the objects with them. As you can see the Reflect materials are still affecting the render image. If you take a closer look at the lens' edges you will notice the green reflection, which is actually the reflect material of the middle boxes. While V-Ray had been tracing the rays on the lens' surfaces, those polygons on the edges had first captured a reflection, so that's why there are green traces. 


 

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Viewport Display

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Viewport Texture – Selected Bitmap The selected texture is displayed in the viewport and it overrides all other material parameters. The viewport texture does not affect the way the material is rendered with V-Ray. It is mainly used for preview purposes.

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 disabled, the material is not overridden by the Material Override option in the Render Settings.