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Users or pipeline TDs can dynamically change the VFB OCIO configuration from within the Houdini UI through Python. Usually, the OCIO variables are set up in the user environment and changing them requires you to exit Houdini, go to System > Environment Variables, manually update them and then restart Houdini. With Python, you can update the environment variables in the Python Shell, and tell Houdini to reload the configuration on the fly.
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