Not a bad start… For your fog, you might want to add alittle texture to it and add some distance. You can do that by clicking on the first depth to the left, holding it and dragging the pointer onto your canvas. That should be your foreground or whatever is closest to you. Then do the same thing for your next depth and that should be your background. It is alot easier to drag onto you canvas rather then trying to come up with a number.
The same thing applys to your Depth cue, dragging it onto your canvas. Just look where you want it to fade, foreground or background…
Some people forget these steps or don’t know how but adds so much more realism to your piece of work…