In our Forest Pack forum we had a question about
creating brick walls. Though this is certainly possible in Forest Pack using UVW mode, it might be easier in RailClone. To illustrate I've made a couple of re-useable styles. In the first and simpler version all the sizes and adjustments are hard coded into the style. It's less flexible but much easier to understand.
The trickiest bit here is getting the correct overlap in the corners which is achieved by using Compose operators combined with 2 null segments and a single brick. By adjusting their padding you can get the correct alignment of bricks in the corner.
In the second version all the important parameters are exported and available in the Modify panel and padding values are calculated automatically. They both use exactly the same principles but the latter's graph is much more busier due to the added complexity. That said if you want to use this style, all you need to do it add your brick models to the Random operators marked
Half Bricks and
Full Bricks

Segments should have
Bend and
Slice disabled, and I would also uncheck
Transform > Transform Affects Size. It is expected by this style that the brick models are twice as long as they are wide. Below is a little video showing this style being used.
The files are attached.
I hope that helps some people, if you have any questions please let me know.
Many Thanks,
Paul