plane

This Blueprint creation script automates the task of creating planes that match bitmap sizes and creating & assigning the right materials. Just select the bitmaps, set a few options and you're done. It's mainly meant for setting up vehicle blueprints, but makes the job of creating even a single image reference plane a lot faster.

with tree shop you can easily plant trees (plane mashes with opacity-mapped bitmaps) into your scene.
each tree is an 'intelligent' object which allows later interaction - like changing/randomizing size - aligning it to the ground (gravity) - changing orientation and map (tree type).