Add realistic Light Rays with Adobe Photoshop (Brush in description) - YouTube
How to Create Your Own Light Ray Brushes From Scratch in Adobe Photoshop - Envato Tuts+ Design & Illustration T… | Photoshop, Photoshop tutorial, Picsart background
LIGHT BEAM brushes by darkonelh on DeviantArt
Light Beams + Rays Photoshop and GIMP Brushes by redheadstock on DeviantArt