I'm having issues with using multiple terrains in a level. Im trying to make a few small islands but with fairly high res terrains. With most of the map covered in water it seemed like a logical way to improve performace by only using terrain where above water. The issue is that when I add a second terrain object / Grid, the first terrain loses its collision.. Its like only one grid can have collision in the level? I assume this is not true, given that I am able to import multiple..? Hopefully a newbie error. thanks.