This is my first shader, so go easy. I'm no pro. What this shader is doing is emulating the effect of light leaks from a cheap camera/lens. It uses 6 textures which are then rotated and flipped to give 12 total variations.
You can adjust the width of the beam, the hue, and the overall intensity/transparency of the effect.
The textures are not the best quality, but I was trying to keep the file size small. If requested I can make some higher quality textures.