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title: "Rendering Very Large Images"
canonical: "https://documentation.chaos.com/space/VMAYA/111741110/Rendering%20Very%20Large%20Images"
format: markdown
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This page provides a tutorial on rendering large images with V-Ray.

## **Overview**

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<span style="color: #000000">Rendering very large images can be memory intensive as very large resolutions require more memory be added to the scene's own memory needs. This tutorial explains how to set up V-Ray to render very large images </span>*directly to disk*<span style="color: #000000">, optimizing memory efficiency. By writing the rendering image file directly to disk, the memory buffer is disabled, saving on overall memory use. This is very advantageous for machines with limited memory.</span>

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> The Progressive sampler type is not supported for rendering out large images in this way.

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## <span style="color: #000000">**Setting Up to Render Large Images**</span>

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<span style="color: #000000">1.  In the Common tab of the Render Settings dialog, set the </span><span style="color: #000000">**Image Format**</span><span style="color: #000000"> to </span><span style="color: #000000">*vrimg*</span><span style="color: #000000">: You may also select Multi-Channel OpenEXR file for the output format. Note that if you choose an OpenEXR file, it will be a tiled file and not scanline-based, because </span><span style="color: #000000">**Memory frame buffer**</span><span style="color: #000000"> is off. However, OpenEXR files do support multi-channel output when the </span><span style="color: #000000">**Memory frame buffer**</span><span style="color: #000000"> is turned off.</span>

![image](media://72dc7a8d-b0a1-4505-90af-0422a6bed1d4)


<span style="color: #000000">2.  In the Render View rollout shown below, set the </span><span style="color: #000000">**Memory Frame Buffer**</span><span style="color: #000000"> to</span><span style="color: #000000">* None.*</span><span style="color: #000000"> You can also set the </span><span style="color: #000000">**Memory frame buffer**</span><span style="color: #000000"> attribute to </span><span style="color: #000000">*Preview *</span><span style="color: #000000">so that V-Ray generates a small resolution preview of the final result.</span>

![image](media://14abaf37-228c-457f-b12b-3a0b2d0bb179)


3.  In the Resolution rollout, s<span style="color: #000000">et the desired resolution of the image (such as </span><span style="color: #000000">*12000 x 12000*</span><span style="color: #000000"> shown below).</span>

![image](media://90b14c37-c607-4c6c-96b7-79763af28ff6)


4.  In the VRay tab, under the Image sampler rollout, switch the image sampler <span style="color: #000000">**Type**</span><span style="color: #000000"> to </span><span style="color: #000000">*Bucket.*</span>

![image](media://9e40834f-c3e9-45f4-9cb0-cf5dab9dd727)


5.  Render the image.

6.  If you rendered to a *.vrimg* file, you can use the [vrimg2exr](https://docs-chaos.atlassian.net/wiki/pages/createpage.action?spaceKey=VRAY3MAX4EDIT&title=V-Ray%20Image%20to%20EXR%20Converter%20%7C%20vrimg2exr)<span style="color: #000000">tool to convert the file to a scanline-based OpenEXR file.</span>


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> Due to increasing the resolution of the rendered image, you may find that the render settings may need to be revised to keep the render noise free due to the large size.