This looks very GOOD! Could you explain a little on how you have created moss on your roof? Is it vertex painting with moss roof tiles or decals or a mesh? Are you also using a tileable texture for the roof? Thank you!
Looks really cool to me. Maybe some of the monitors need a bit more variation, they look all the same too much. In Unreal I'd use a decal with dust or some imperfections and should do the trick. The "worksite emergency respond.." seems to be flying in front of the wall even if it is still glued in some parts to the wall.…