---
title: "Rendering Overrides"
canonical: "https://documentation.chaos.com/space/VMAYA/111739148/Rendering%20Overrides"
format: markdown
---
This page provides information on the Render overrides rollout in the Render Settings.
## **Overview**
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## **Parameters**
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> Macro (anchor)
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### **Example: Secondary Rays Bias**
This example shows the effect of the **Secondary rays bias** parameter. The scene below has a box object with a height of 0.0, which makes the two sides of the box to occupy exactly the same region in space. Due to the overlapping faces, V-Ray cannot resolve intersections of rays with these surfaces.
The first image shows what happens when the scene is rendered with the default settings. Splotches appear in the GI solution, caused by the fact that rays randomly intersect one or the other surface:
In the second image, the **Secondary rays bias** is set to 0.001, which offsets the start of each ray a little bit along its direction. In effect, this makes V-Ray skip the problematic surface overlaps and render the scene correctly:
Note that the **Secondary rays bias **setting affects light ray calculations in the rendering (such as GI and reflections), but it alone cannot correct for materials on overlapping faces. To correctly render the overlapping faces, the material assigned to the box has its 2-sided option checked. This is so that the object looks the same regardless of whether the camera rays hit the top or the bottom of the box. If the material did not have this option checked, it would appear "noisy" even though the **Secondary rays bias** is greater than 0.0:
