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If you install the license server on the machine that runs V-Ray its installer takes care of configuring your system to use it and you don't need to take further action. But you may want to use an alternative server or set up the server on a machine that has no prior configuration. You can use the setLicenseServers
global method for this. See the code comments for usage details. Make sure you call this before creating a VRayRenderer or VRayServer object, because their constructors require a license.
For more information, see the Set up your V-Ray License the Chaos License Quick Start Guide page.