Finding and Identifying the Light Source
Before we can create the ray of light, we need to separate the bright areas from the image.
Open a photo you would like to edit. Or, you may use the photo used in this tutorial
Before we start, we need to duplicate the layer (Layer> Duplicate or Ctrl+J).
To find and separate the light source in the photo, we’ll use the Levels tool (Image> Adjustment> Levels or Ctrl+L). Drag the middle input slider all the way to the left.