How many trees are you putting in your model? And how large (in inches/mm or pixels) will each tree be in your final rendered shot?
Chadwick wrote:
I am using trees and shrubs from the Gardenworks/ArchiBAM 3D library.
In that library there are 3 generic trees named Simple Tree Rough, Simple Tree Medium, and Simple Tree Smooth.
Simple Tree Rough will give you relatively few polygons. For anything other than a really closeup view (where no ArchiBAM tree will look realistic anyway, and you would need a fully modeled tree for that shot), the Simple Tree Rough is more than OK and it is the texture that matters.
If the trees are too many and you need only one shot, it might make sense to render a few bunches only and then Photoshop-clone paint them all over the place.