I am using the compositor to add a starry background image, with the Alpha Over node. However, the background is still visible through some (and only some) of the foreground elements, i.e. the ship (but not the planet). All elements, the planet and the ship and the engine cones, are on different render layers.
Can anyone offer me assistance regarding how I can change my node setup or render setup so as to not have the stars showing through the ship…? A screenshot of my node setup and result (attached) should make it clear what the problem is. Thanks!