Everything was working wonderfully until my last build when all the buildings in my scene stopped colliding and now I can walk through them all though other items in the world seem unaffected and they have the same settings, only my buildings wierdly though they were one of the first things added to my scene(low poly). This is only happening in my build and it still all works great in the editor any ideas of where Ive went wrong? Only thing I can think of is I added a load of trees with box colliders(terrain tool) is their an upper limit that I could of passed or is it something else? I know I had to change my box colliders from discreet to get them working correctly in build but I don't get that option with the mesh colliders. I have just removed them and added them again and it seems to have fixed the problem for now but any ideas on what ive done wrong or what has caused the problem for when it happens next time? I am just using the collider with the default settings.