I am trying to make this image, with the ship emerging from a gas cloud.  I used a v-node on the volume density, but it seems to be filling from the back of the image, although I want it to stop halfway up the ship.  Also, the higher I make it stop, it tends to arc and stop being a straight line.  I have tried a lot of different things, but they all seem to work the same as the settings in the screenshot.

 Also, I can't seem to get any decent shadows in the atmosphere.  The fog looks ok with real high atmospheric strength on the light and a real low (.008) density or vice versa, but when I bring the numbers closer together the fog gets real bright and starts to wash out the image.