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• VRAY_FOR_HOUDINI_PLUGINS – this environment variable must be pointed to the folder holding the compiled plugin.
• VFH_USER_HOME – this environment variable must be pointed to a directory that contains a "ui" folder. The "ui" folder must hold a ".ds" file that shares the same name as the custom plugin. Please refer to one of the *.ds files inside the V-Ray for Houdini installation folder → /ui/plugins for examples. 

UI Path: ||mat Network|| > V-Ray> Texture: Utility > V-Ray User Plugin Shader

||out Network|| > V-Ray Render Elements node > V-Ray> Texture: Utility > V-Ray User Plugin Shader

Parameters

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