I am having some trouble with trees, Umbrella and Pinyon trees from Scorched Earth to be exact. When I place those trees, after harvesting 5 or 6 of them, leaves disappear from all of foliage instances of those trees. For example, after harvesting 5 Pinyon trees, all other Pinyon trees lose leaves and look naked and ugly. I tried playing with LODs, but I do not know what to do exactly. If anyone could help, that would be great.