OK. Here it is with the ghost more transparent.
Spooky Lane Comp more ghostly by
Jon Short, on Flickr
I wanted to make it even more transparent however when I do the ghost looses alot of her form and just seems to disappear in the fog. Which is great but would be really easy to miss.
Here are the layers I used for the fog. This probably doesn't help much but you can see how much went into just the fog alone, which I admit was the hardest thing to get right, Im still not sure it is right lol.
Fog layers by
Jon Short, on Flickr
A very good source for alot of Photoshop stuff is
PHLEARN. And he does some good tutorials on mist/fog
HERE and
HERE.
The main thing I used for the texture/body of the fog was: Filter > Render > Difference clouds and then used the screen blend mode (i think) and then used Free Transform to move and reshape.
I also used "White -> Transparent" Gradients and also painting white and altered Opacity.
Like I say the fog was the hardest thing to do and if I didn't stop when I did I would still be P***ing about with it now
Hope this helps
Much Love
Jon.