Mount Adams in Washington state. It is a large file but contains details missing from my 3 arcsecond map. The elevation has not been scaled so is 1X. It has been constructed using 1 arcsecond resolution SRTM data from the Space Shuttle (about 3.1 million facets). This software was created using a new and, as yet, unreleased version of SRTM2STL. The source code for creating files at 3 arcsecond resolution is available up on github under the GNU license. Go to github and search for SRTM2STL.