A "physical" correct setup Concrete made of the great Arroway.de textures. they use a free low res version, for full quality buy the Arroway concrete texture library. it is worth any cent. you can easy add a coating or finish to it in adding a specular layer above the main one (for concrete floors p.e.)<br /> <br /> as all physical materials it uses real specular reflection with IOR, it still renders very fast in vray.<br />