V-Ray Material Complex represents a network of connected V-Ray nodes that can be used for various purposes. It is basically a preset V-Ray Material Builder, that has its interface exposed for easier tweaking of the settings.
All assigned texture maps can be made visible in the Houdini viewport. The tabs of the V-Ray Material Complex have two options of displaying the parameters - in default mode, where the most common settings reside, and in advanced mode, where you can have finer control.
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