Brick Wall Builder is a scripted plugin created using 3ds max MCG and as the name tells it creates a various shapes of brick walls with huge amount of flexibility like you can choose multiple kinds of stones and apply a random materials to them in addition to changing the position,rotation and scale uniformly or randomly. It's as simple as just picking the shape and the brick and it will do the rest, and when you are done with distribution you like and thought of changing the shape length do worry also has the ability of maintaining the count and distribution while you are doing so.
How to install: After downloading and unzipping the file go to Scripting menu and choose Install Max Creation Graph. after installing you will find it in command panel creation tab under VFXarabia category.
Please for more info check the tool videos or the tool page on my website: http://goo.gl/SsLwxK
Alaa Al Nahlawi