It looks quite good. But 81600 polys per tree will kill most computers. Even if there is lod. How long did it take the engine to stop shuddering enough for you to take that pic? lol.. 
The most you need per tree is around 3k to 5k poly. And use lod.
It uses LOD.
81600 triangles are for the most detailed trees.
It renders 755 3D trees with varying level of detail in 3.66ms (on GTX 460).
Trees are coming from procedural tree generator that can produce all LODs and integrates well with the way of rendering distant forests.
If you think your computer shudders from rendering that, you can still reduce the quality, and it will use less, it won't have detailed
branches, and all. You probably don't need the detail when you stare from a high seat in a mech thingy, but you don't have to use it, do you? But when you fall off the thing and end up hanging on a tree branch, you'll be able to appreciate the detail.
And the noises of leaves rustling in the wind, chirping of the birds ... and rusting of the metal
