- switch to development build of ArmA 3
- launch **arma3diag_x64.exe** in Arma 3 root folder
- load Altis in Editor
- place houses on the main airfield from Props -> Structures (Altis) / (Livonia) / (Malden) / (Tanoa)
- press play scenario
- look for visually obstructed window(s) for the player in houses
- if found, go inside the house and face the concerned window(s)
- open debug console and local exec: diag_drawMode "viewGeometry" to see if in this mode the window(s) is still visually obstructed
- open debug console and local exec: diag_drawMode "normal" to return to normal view