"Origin" is a short film by James Stacey, on which I have worked as a lighter and compositor.
While it premiered in Galway Film Festival 2011, it has been released online only recently.
I was asked to do some Making Of article - below are some slideshows showing compositing stages of the forest shots:
This one is similar, but more detailed, showing all the raw render passes used in the compositing process.
And this is the link to the project website, where you can watch entire short: