Set the opacity of the layer to “soft”, to make it semi transparent. Using the eraser tool with a sharp edge, remove all the remains, so that it will look as if this sun (or moon, if u wish) will create the illusion or setting behind the hills / land line of the horizon.
See the illustration for understand it better, and once you have finished erasing, don’t forget to set the blending options back to normal
Go to Layer >>Layer Styles >> Blending options, and apply these settings for the outer glow effect. Don’t skip this step, this is necessary to make an effect of shine and glow.
Select the water scape layer.
Go to Filter >> Renders >> Lightening Effect.
Make a light spot, exactly on the place where the sun is… this will lit the water in front of the setting sun.
This is what we got so far, beautiful water with a local lightening.
Select the layer with the cropped girl (main figure) and apply same spot lightening effect.
Its important to use same location for the spot, as we only have one sun here!
Set the blending options of the layer with the girl to “Luminosity”, in order to give her same hue as the layers underneath her.
After the recent few steps, you canvas should look like this… If anything looks different – don’t worry, in the end you might get even a better result than the example in this tut.
Now, we are going to need wings to add to our girl and turn her into a fallen fairy.
I’d recommend to use Photoshop brushes in a shape of wings, and not to crop wings from other photos, as we need high quality transparent wings.
For this very tutorial, i used wings brushes downloaded free from Deviant art – http://www.deviantart.com/deviation/11925788/
Once you have installed the brushes, make a new layer (don’t for get) which will be placed BELOW the girl, and ABOVE water scape layer and the sky.