looks more like he had to use 2
did you read the article? He mentions a few things he tried. But as you say.. a shame he doesn't show the texture files
He does share his UDK files though it seems (I dont have the Unreal stuff so I can't see what is actually in the rar file).
that's a "Ch" pronounced as a "K"
Computer skills I should have:
Maya, XSI, Photoshop, AfterEffects, Motion, Illustrator, Flash, Swift3D