kitforums.com is having a diorama contest, and I will have several blog entries on the 3d printing portion of the project...this being the first. For HO scale, the contest is limited to 36 square inches, and I went the simple route, and did mine 6" x 6". The rules were pretty simple, and can be viewed at kitforums.com should anyone really care.
My concept was to model the back of three townhouse/row house units that backed up against the tracks, this being the first concept drawing. The blog entry will cover the right most unit, the unit features a metal standing seam roof, and a dormer.
This is one of my early drawing. My main interest was to learn more about 3d printing model railroad structures, and getting these done in time to use in clinics I am presenting at the Mid-Continent NMRA in a few weeks.
As is normal on a new design, it takes several attempts to get everything correct to print.
Here is the roof sections in a trial assembly.
Each door and window is an individual piece, although they were all printed at the same time. The roof and dormer is made up of three pieces, plus the window, and then the steps are one piece.