What we are going to do is substitute a new shader combination for the alpha channel image. This possible in Archicad 11 since now the brick shader formerly only available as a color shader in previous Archicad versions applies that shader in the Displacement Class - providing depth effects.
1: DUPLICATE the existing Flemish Bond Material. Name the new material
"Flemish Bond SHADER from Dwight to whom i will be eternally grateful and buy his book that will include this lesson as a part of the Archicad 11 supplement"
2: Select the Brick Bonds Shader under Color Class. Select Flemish under parameters. Adjust size and color to suit.
Dwight Atkinson