This actually is the third (and last one) piece from a small series I started some time ago which represents battle between two opposing races : a mechanical one and an organic Ent -alike forest creatures.

In the first piece I tried to catch the actual ‘first encounter’ between these two opposing forces.
http://forums.cgsociety.org/showthread.php?t=613377

The second one represented an end of the conflict when the mechanicals gained victory.
http://forums.cgsociety.org/showthread.php?t=617945

And this one shows the second alternative end of the conflict in which the forest creatures’re victorious.

Modeled & rendered in 3ds max / mental ray,- textures, part of the post fx,matte painting & compositing and additional corrections made in Photoshop.