Tutorial Vray for sketchup "how to make a dirty concrete wall"

How to make a dirty wall, is one of the most frequently asked questions that we receive

and Hoang Anh (You can contact him by clicking on the His Name) who knows very well the technique of the usage of vray, sent us immediately, another excellent Tutorial to obtain this result with two simple steps, including the textures used with the related mappings 

and the vray vismat material, downloadable here

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