This should give you an idea of how things were done: chopping off the tree, getting rid of bright winter's sun and some branches as well as other less good looking stuff, like the road in the foreground. Cleaning up the snow, adding even more snow, putting back in the tree, adding light to the windows, bringing in back lit curtains, adding lighting strings, and finally using the two borrowed pics to add a good looking full moon and some stars. Hope you enjoyed the show :)