hi guys thanks for the feedback.
It looks pretty hard to me to make a real breakdown right now. It was this summer and i'm pretty sure that everything is compressed and archived at Mathematic. I don't work here right now but next time i go i will make something for get back some data.
some various infos :
We exported Terragen mesh to .obj to give reference to animator.
For static shot.
Scene was render in maya mainly the foreground (up to 50 meter).
I was comped in After Effect or Flame with terragen static render, photo, matte painting et live stockshot).
We can say that static shot landscape are 15 % made with terragen.
For moving shot.
Camera was exported to Maya via .chan to Terragen.
Everything about the landscape was render in Terragen.(+z depth for comp)
Car is always render with Mental Ray.
Merkatz is always render with 3Dlight.
Fx : smoke, dust, etc : real flow, houdini.
About plants :
Some plants are coming from xFrog plants but many of them are custom one made in maya by in-house artists. (sometime just some simple sprites with a 2d warp sometime something lot more complexe in 3d)
I can't give you a complete breakdown right now.
But i hope that i will update this thread with High-resolution render, test render, free-HDRI,etc, .tgc, etc...