---
title: "Tips"
canonical: "https://documentation.chaos.com/space/VC4D/116856906/Tips"
format: markdown
---
This page provides some extra tips on rendering a V-Ray Volumetric Grid. 


<span style="color: #000000">**Manually equalizing the render settings with FumeFX**</span>

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Certain FumeFX settings can be optimized to keep render times as low as possible:

- Make sure the **Step %** value matches the corresponding FumeFX step parameter. A smaller **Step %** value will lead to longer render times.

- In the **Fire** rollout, select **Fuel** as the channel the fire color is based on, as this is FumeFX's Fire channel after importing the *.f3d* file. For** Fire Opacity Mode**, choose the **Use Own Opacity** option and carefully duplicate the fire color and fire opacity diagrams from FumeFX.

- Please note that VRayVolumeGrid does not support the Fluid Mapping option in FumeFX.

- VRayVolumeGrid has the option to illuminate the other objects in the scene automatically by using emissive lights. This increases render times. To turn it off and keep only the illumination on the volumetric itself, set the **Light Power on Scene **value to 0.0 and set **Self-shadowing** to **Grid-based**. You can also speed up the calculations of self-illumination by reducing the **Light Grid Resolution (%)** value.