Brick Pattern Won't Display for User Material

[reenie]

BTW, I did find a post with a similar question and the response was to set the wall covering to a material with a brick pattern then adjust the material definition. I did that - set the wall covering to a white subway tile, then tried adjusting the material definition to set the marble that I want. Still didn't work. Here's a screen shot (the second tile from the top (just above the blue border tile) is what I'm referring to:

I'm trying to do a 19x19 inche tile off set, however, can't get it to work when I've imported the material in. Also, I noticed you had an accent band, how did you add this? I have a linear glass mosaic that I want to add vertically to my walls and can't figure this out either.