I do it for both the leaves and the trunks. the trunks often look much brighter with the default morrowind materials so you might want to darken some of them.
OK, I'll do that then. Thanks.
edit: i saw animation nodes, are the trees are animated? I didnt see any animation in the editor.. maybe they're there for some other technique.
A lot of meshes that some people made have those animation nodes, afaik they don't do anything. Sometimes they actually make the mesh unusable in the CS. But these seem to work fine, so I haven't bothered deleting them yet.