CorVex is a scripted geometry plugin for Autodesk® 3ds Max® 2010+ aimed at quickly building game level layout for any game engine or even general design. It offers convenient seamless, tiling mapping controls and geometry that is controlled by spline bases. You can create blocks or walls, and the walls have much more convenient UV control than standard AEC Walls.
See the documentation, feature list and videos here: http://dev.wallworm.com/topic/66/corvex.html
Please note that the version available in Autodesk Exchange may be behind the version found on the Wall Worm website because of the review process on the Autodesk website.