In this image, i added streaks of light. I wanted individual streaks as it would look too much if i made the whole ring of light round the entrance. At first, they were way too bright, so i lowered the opacity to blend more with my foreground.
In this image, i blended the edges of the rays of light as i felt they were too sharp and took away from the rest of the image. I also added more highlights to the rocks at the foreground so it would look like the light was hitting them in the right way.