Zbrush question - Brush sampling orientation

Irreal

Hey all,

I've got a zbrush problem that I can't seem to figure out. I've sculpted a stone block texture using seperate subtools for each brick. I have a plane behind these subtools to use as the grout layer. Here is the problem:- When sculpting on the grout layer (with my brick subtools showing) my brush is sampling and orienting itself to the brick subtools. I dont want this. I only want it to sample its orientation from the grout layer. Any ideas what I need to set on the brush so that it samples only from the selected subtools and not every subtool?

Hope that made sense

Irreal

K I found a partial solution. Switching on Transparent mode makes the brush ignore all the other subtools. However, you can't really see what you are doing