Got inspired by a bunch of similiar ideas I've seen over the years. Had a strong vision of what the final image should look like and the result pretty much matches my expectations.
Completely made in Photoshop CS4 Extended. Used phoshops 3d features for the planet. The cross was made with brush strokes using a tablet and then I used splatter image brushes on top of that. Since I made this from scratch I decided to make it in large print resolution (for a poster etc.), and so the final image is 4500x6000px. Took me only about an hour to make.