One of the biggest obstacles is creating the right mood, and "selling" the sets as life-size, and not miniatures. This is a color grade test of the sets so far. This is by no means the finished look of the film, but it is a taste of what the finished film can look like. Color grading is taking what you have done in color correction one step further, by altering an image for aesthetic and communicative purposes.
I'm busy working on my blog posts. Watch this space!