How to Download OpenColorIO
If you are working in the field of visual effects and animation, you may have heard of OpenColorIO, a complete color management solution that helps you achieve consistent and high-fidelity color across your digital content creation applications and pipelines. In this article, we will explain what OpenColorIO is, why you should use it, and how to download and install it on your system.
What is OpenColorIO and why use it?
OpenColorIO (OCIO) is a color management framework that was developed by Sony Pictures Imageworks and is now sponsored by the Academy Software Foundation. It is designed to handle complex color workflows in motion picture production, with an emphasis on visual effects and computer animation. OCIO provides a straightforward and consistent user experience across all supporting applications, while allowing for sophisticated back-end configuration options suitable for high-end production usage.
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OCIO is compatible with the Academy Color Encoding System (ACES), which is a free, open, device-independent color management system that aims to be the filmmaking industry standard for managing color. OCIO also supports many popular LUT formats, such as .3dl, .spi1d, .spi3d, .csp, .cub, .mga, .m3d, .ccc, .cc, .cdl, .clf, etc.
What are the benefits of OpenColorIO over other color management systems?
Some of the benefits of using OpenColorIO over other color management systems are:
It is stable, secure, and thoroughly tested on Linux, macOS, and Windows.
It is performant on modern CPUs and GPUs.
It is simple, scalable, and well documented.
It is compatible with critical color and imaging standards.
It provides lossless color processing wherever possible.
It maintains config backwards compatibility across major versions.
It has every new feature carefully reviewed by leaders from the motion picture, VFX, animation, and video game industries.
It has a healthy and active community.
It has wide industry adoption.
How to download OpenColorIO
You can download OpenColorIO from various sources, depending on your preference. Here are some of the most common ways to get OpenColorIO:
Downloading from the official website
The official website of OpenColorIO is , which contains the source code, binaries, libraries, plugins, and configuration files for different platforms.
Downloading from GitHub
If you want to get the most up-to-date version of OpenColorIO or contribute to its development, you can clone or fork the file to build OpenColorIO from source.
Downloading from SourceForge
If you prefer to download OpenColorIO as a zip file or a tarball without using Git or GitHub, you can use , which mirrors the GitHub repository and provides direct links to download OpenColorIO for different platforms.</p How to install OpenColorIO
Once you have downloaded OpenColorIO, you need to install it on your system. The installation process may vary depending on your operating system and the method you used to download OpenColorIO. Here are some general guidelines for installing OpenColorIO on Windows, Mac OS, and Linux:
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Installing on Windows
If you downloaded OpenColorIO from the official website or GitHub, you will have a zip file that contains the binaries, libraries, plugins, and configuration files for Windows. You need to extract the zip file to a location of your choice, such as C:\Program Files\OpenColorIO. You also need to set the OCIO environment variable to point to the configuration file you want to use, such as C:\Program Files\OpenColorIO\configs\aces_1.0.3\config.ocio. You can do this by going to Control Panel > System and Security > System > Advanced System Settings > Environment Variables and adding a new system variable with the name OCIO and the value of the config file path.
If you downloaded OpenColorIO from SourceForge, you will have a zip file that contains the source code and the CMake files for building OpenColorIO on Windows. You need to extract the zip file to a location of your choice, such as C:\OpenColorIO. You also need to have CMake, Visual Studio, and Python installed on your system. You can follow the instructions in the file to build OpenColorIO from source using CMake and Visual Studio.
Installing on Mac OS
If you downloaded OpenColorIO from the official website or GitHub, you will have a tar.gz file that contains the binaries, libraries, plugins, and configuration files for Mac OS. You need to extract the tar.gz file to a location of your choice, such as /Applications/OpenColorIO. You also need to set the OCIO environment variable to point to the configuration file you want to use, such as /Applications/OpenColorIO/configs/aces_1.0.3/config.ocio. You can do this by editing your .bash_profile or .zshrc file and adding a line like this: export OCIO=/Applications/OpenColorIO/configs/aces_1.0.3/config.ocio
If you downloaded OpenColorIO from SourceForge, you will have a tar.gz file that contains the source code and the CMake files for building OpenColorIO on Mac OS. You need to extract the tar.gz file to a location of your choice, such as /Users/username/OpenColorIO. You also need to have CMake, Xcode, and Python installed on your system. You can follow the instructions in the file to build OpenColorIO from source using CMake and Xcode.
Installing on Linux
If you downloaded OpenColorIO from the official website or GitHub, you will have a tar.gz file that contains the binaries, libraries, plugins, and configuration files for Linux. You need to extract the tar.gz file to a location of your choice, such as /opt/OpenColorIO. You also need to set the OCIO environment variable to point to the configuration file you want to use, such as /opt/OpenColorIO/configs/aces_1.0.3/config.ocio. You can do this by editing your .bashrc or .zshrc file and adding a line like this: export OCIO=/opt/OpenColorIO/configs/aces_1.0.3/config.ocio
If you downloaded OpenColorIO from SourceForge, you will have a tar.gz file that contains the source code and the CMake files for building OpenColorIO on Linux. You need to extract the tar.gz file to a location of your choice, such as /home/username/OpenColorIO. You also need to have CMake, GCC, and Python installed on your system. You can follow the instructions in the file to build OpenColorIO from source using CMake and GCC. How to use OpenColorIO
After installing OpenColorIO, you can start using it in your color workflows. OpenColorIO can be used in two ways: in supported applications and in custom applications.
Using OpenColorIO in supported applications
OpenColorIO is supported by many popular applications in the visual effects and animation industry, such as Adobe After Effects, Autodesk Maya, Blender, Foundry Nuke, Gaffer, Houdini, Krita, Natron, OpenImageIO, Photoshop, RV, Unreal Engine, and more. You can find the full list of supported applications on the .
To use OpenColorIO in a supported application, you need to enable it in the application settings and select the configuration file you want to use. For example, in Blender, you can go to Edit > Preferences > Color Management and choose OpenColorIO as the Display Device and select the config file from the drop-down menu. You can also customize the color spaces and views for different render engines and output formats.
Using OpenColorIO in custom applications
If you want to use OpenColorIO in your own custom application or pipeline, you need to integrate it with your code using the OpenColorIO API. The OpenColorIO API is available for C++, Python, and Java. You can find the documentation and examples of the API on the .
The OpenColorIO API allows you to create and manipulate color configurations, color spaces, color transforms, color processors, and color contexts. You can also apply color transformations to images or pixel buffers using the OpenColorIO CPU or GPU renderer.
Using OpenColorIO command line tools
OpenColorIO also provides some command line tools that you can use to perform various tasks related to color management. These tools are:
ociobakelut: This tool allows you to bake 1D or 3D LUTs from an OCIO config file or from a specific color transform.
ociocheck: This tool allows you to validate an OCIO config file for errors or warnings.
ociochecklut: This tool allows you to check the quality and accuracy of a LUT file against an OCIO processor.
ociodisplay: This tool allows you to display an image with an OCIO view transform applied.
ocioconvert: This tool allows you to convert an image from one color space to another using an OCIO config file.
You can find more information about these tools and their usage on the .
Conclusion
In this article, we have learned what OpenColorIO is, why it is useful for visual effects and animation professionals, and how to download and install it on different platforms. We have also learned how to use OpenColorIO in supported applications, custom applications, and command line tools. We hope that this article has helped you understand the basics of OpenColorIO and how to get started with it.
If you want to learn more about OpenColorIO, you can visit the that showcase how OpenColorIO has been used in various projects and studios.
Thank you for reading this article. We hope that you have enjoyed it and learned something new. If you have any questions or feedback, please feel free to leave a comment below. Happy coloring!
Frequently Asked Questions
What is the difference between OCIO and ACES?
OCIO is a color management framework that supports various color standards and formats, including ACES. ACES is a specific color standard that defines a set of color spaces and transforms for motion picture production. OCIO can be used to implement ACES workflows in different applications.
How do I create my own OCIO config file?
You can create your own OCIO config file using a text editor or a spreadsheet program You can create your own OCIO config file using a text editor or a spreadsheet program. You need to follow the OCIO config syntax and structure, which are explained in the .
How do I update OpenColorIO to the latest version?
You can update OpenColorIO to the latest version by downloading it from the official website, GitHub, or SourceForge and replacing the old files with the new ones. You may also need to update your OCIO environment variable and your application settings to use the new version. Alternatively, you can use a package manager such as to install and update OpenColorIO automatically.
How do I uninstall OpenColorIO?
You can uninstall OpenColorIO by deleting the files and folders that you downloaded or extracted when you installed it. You may also need to remove the OCIO environment variable and any references to OpenColorIO in your application settings. If you used a package manager to install OpenColorIO, you can use it to uninstall OpenColorIO as well.
Where can I get help or support for OpenColorIO?
You can get help or support for OpenColorIO by visiting the .
What are some alternatives to OpenColorIO?
Some alternatives to OpenColorIO are:
OCIO-Configs: This is a collection of OCIO config files for different color workflows and standards, such as ACES, Filmic Blender, Nuke Default, etc. You can use these config files with OpenColorIO or other color management systems.
Colour Science: This is a Python package that implements various color science models, algorithms, and transformations, such as ACES, CIE XYZ, CIE Lab, etc. You can use this package for color research, analysis, and processing.
Little CMS: This is a color management engine that supports ICC profiles and various color spaces and formats. You can use this engine for color conversion, gamut mapping, and color correction.
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