Before and After

Step 1
Since PhotoFiltre doesn’t have a camera flash effect, I’m giving you one to use. Save this camera flash I made for you.

Step 2
Open up your picture in Photofiltre and click the Photo Masque button. Go to your My Pictures folder and find the camera flash texture.

Step 3
Make your settings however you want. Mine were like this:

You can look for more lens flares on Deviantart.com and use this technique to apply different ones to your pictures.