Good idea, but it doesn't do it for me, at least for the "spirit" (sorry couldn't resist) of this challenge. I like the idea and the execution, but my taste tends towards the "real" unreality of many of the other submissions. Good work and good luck.
Note: I’ve not marked down for the effects.
I'm not really a fan of the editing here but I can see how you may have wanted the white lines to appear as ghostly shapes. The position of the cross is good, and had the editing not been done I'm sure this would have looked like quite a good spooky cemetery shot.
The shot is well done overall but the post processing isn't to my taste. Never have been a big bas relief fan :) The corpping the trees, the cross all really add to the shot and gives you a very good sense of the holiday. A 7