Here's the pic i'm going to start with:
Blah. Boring pic with boring sky. I cannot tolerate a boring sky, so i will switch to a cloudy sky, using filterstorm.
Once the photo is loaded into filterstorm, i will hit the button that looks like the sun and scroll down to the bottom and select double exposure.
Any colour that you set the tool over will be replaced by the 2nd photo. Voila! here is the boring sky replaced with clouds.
I paint away the rough bits and i'm done! Well, not done for me, but it COULD be. You can use this tool for all sorts of selective adjustments - to blur all parts of the pic that are one colour, to change one colour to another, to selectively brighten, darken, adjust contrast or white balance...it's very handy!
Hope this helps! Thanks for sticking with it to the end - here's a 10% discount code for wearagrams on my etsy store. Your own instagram photos in a pendant. You can wear them as a necklace, use them as a keyfob, pimp your pooch's collar...it's up to you! The code is: FSBLOG10
wearagrams by 80sgirlart on etsy