A rainbow is a meteorological phenomenon that needs many specific conditions to come together in order to appear, which is why they are not that easy to come across. They are, however, a beautiful and evocative sight, and they are associated with different cultural and even religious meanings.
For all these reasons you might want to have a rainbow in your image even when there isnt one, not to worry though, heres an easy way to create them in Photoshop.
Choosing the right... more