Map Builder - Ingame 3D-Editor for terrain creation in ARMA 3 - TERRAIN - (BUILDER) Posted March 17, 2015 · Edited March 17, 2015 by Santa Six What interface size do you use? I've tried normal and large at 16:9 1600x900 and the UI is still cropped. Selecting already placed objects is extremely difficult compare to how easy it was in v0.6 alpha. The Ctrl+LMB for height was more responsive when it was LMB+RMB. It now takes meany mouse slides to get the desired height. Although the new Fencing feature is outstanding along with the drop down objects list.