The August issue of the Annual 2011 contains a black and white drawing style for creating geomorph tiles of vertical dungeon cross-sections. The idea is based on work published on various roleplaying blogs concerning geormoph dungeons, especially Stonewerk's Blog.
Not only does the August Annual include nine pre-drawn geomorph tiles, it also provides you with the tools and a guide to create your own tiles quickly and easily.
The style pack Vertical Dungeon Geomorphs includes