How to Add Rain Effect to your Picture

It's one of those days, when you have this kind of melancholic feeling and wish that it's raining outside but it's not. So, you pick a picture and decide to do a rain effect on it. Or maybe today your design theme is inspired by that Rihanna's song...'You can stand under my umbrella...ella..ella' and you have your model, an umbrella but sadly no rain. No matter what your situation is, this