Simply plug-and-play with the V-Ray material library. There’s no need to spend hours customizing a material in another program because the photoreal details are already baked-in to the render-ready materials. Materials for rendering include attributes that SketchUp is not concerned with, like reflection, bump maps and luminescence.
While SketchUp materials will render OK in most rendering engines, you will get the best result by using the materials that the rendering package includes.