It was a feature somebody asked for. Kevin did the work of defining a new wall format that is smaller than the UA layout, and Phalzyer wrote EasyWallTex and did all of the high-res support in DC. Both of those guys have dropped away from DC to other things for the moment.
I will update the line as you suggest and include it in the next release. Thanks for the update
------------------
CocoaSpud
Dungeon Craft Development Team
http://uaf.sourceforge.net