These were the only bigger mattes in the movie so I had time to switch between the creature design work and mattep. The concept for the first matte is mine and there was no 3D involved in either of them since both shots were pretty much lock-offs. ( The image under the pencil sketch is a rough photoshop concept painting). I did work closely with a compositor for the final comp since there was a lot of atmosphere added to convey some motion. The concept for the second matte was done by the above-mentioned compositor and then I took it over, developed it further and finished the detailing.
I've had problems adjusting the gamma for these particular mattes because the files have gone so many changes and conversions they can't handle much manipulation anymore. Lighter versions show a lot of artifacting and the darker ones, (unless you're eyes are adjusted to low lighting) hide a lot of detail.
Yes this project was done at Toybox (Now Technicolor)