@The Shadow: I think the first screenshot is good on the sub level... wait that comes out wrong.
I mean where you've got "sub" blending is good, but the other areas are a little... well... foggy. If you have two fogs, decrease the non-blended one's opacity. If it's just one, decrease the opacity, and increase the darkness of the screen-tone.
The second screenshot I'll agree with the others. Make areas not near the campfire or moon darker, and near them brighter. Increase the contrast of the overlay.