Erhan Toker posted an 18 page detailed AutoCAD Rendering e-Book “Creating Render Materials in AutoCAD" from A to Z, for free on his Daily AutoCAD Blog. e-Book: Creating render materials in AutoCAD
Kudos and many thanks to both Erhan and Orhan for their excellent team in Turkey and all the knowledge they spread! The Daily AutoCAD blog is definitely a must subscribe RSS feed.