Hello there, I want to suggest a plugin wich deals with "painting" schematics. It's called schematicbrush. With this plugin you can spray schematics like it would be a common for example wool ball. Of course then you have to work on restrictions and stuff like that, but It would be cool and helpful for placing custom made trees. That was my problem with the trees on my 3rd plot, too. - What can it what VoxelSniper or WorldEdit can't? You've got the opportunity to make the schematics face all time a different way. So you don't got a problem with making forests looking unnatural.