Thanks guys. It was a big break to get this job, at a difficult time last year.
@Frank I agree, but then I was the last link of the chain, ie the camera moves were plotted, motion control filmed, etc, then finally, I was tasked to fill in the background. I also had a mesh model of the landscape used in the films to work with, so there was some head scratching involved in getting that into Terragen, (ended up with a top down camera render, with a black to white grad on it).
The plate below, shows what I had to supply. The clouds were used purely to cast shadows on the landscape, and were swapped out with a camera mapped skybox. This gave us a lot of flexibility on what ever mood the client wanted in the sky. Also, close to mid ground, was filled in with V-ray scatter, because we needed the trees to interact and cast shadows on the CG buildings. The castle rock was something I wasn't keen on using Terragen for, quite simply because of the need for complicated masks, and this being the first job we'd used the software on (funnily enough, we ended up using TG because our upgrade to Vue 8 was a dissaster).