Box Mapping Scale for V-Ray Preset Materials in Grasshopper

Hi forum,
I made a Grasshopper setup for a roof. Now I want to texture it using an existing shader/material (VRAY Plugin). Applying the material works but I can’t control the box-mapping scale. Which node do I need for that?

The mapping is applied on the geometry. Depending on what your object is you have different approaches.

If the object is a Rhino object you map it in Rhino and pick it in GH
if the object is a GH object, you use plugins like Human to apply mapping, since GH does not have mapping tools

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