Oh, and for a forest....

What I have found can work is to acquire a few very nice, decent res tree models for close up. Then I render those, and use the renders as textures and the alpha channel as a transparency, and load them each onto two intersecting squares to create a very low poly forest. For many scenes, just a single flat square is all you need for each tree if you position them correctly in your scene. Or you can render several high res models together and put that on several flat rectangles to flesh out the look. :) No need to take photos and try to get a clean cut-out of trees.

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PoserPro 2014, PS CS5.5 Ext, Nikon D300. Win 8, i7-4770 @ 3.4 GHz, AMD Radeon 8570, 12 GB RAM.