WRITTEN BY Blair Farris PHOTOGRAPHY BY Casey Dunn LANDSCAPE ARCHITECTURE BY Lance Thompson, Thompson + Hanson ARCHITECTURE BY Ryan Street & Associates BUILDER Brian A. Bailey Homes When I tell people who haven’t been to Austin that the terrain is extremely hilly with cliffs overlooking the Colorado River, most folks just don’t get it. Texas is so flat, they say. Lance Thompson with Thompson + Hanson was hired to make sense out of a difficult but stunning lot. The steep …