Add a natural Sun in the empty sky - Learn Psd

Open a natural sky picture or wallpaper. We use here a image which one you can use or as your wish.

Go Filter > Render > Lens Flare... or follow the image bellow

a Lens Flare window will come like below

Here you see a small preview of natural image in the Flare Center. Now click into the small preview of natural image where you want to place you sun. 

Brightness: 100%

Lens Type: 50-300mm zoom

Click Ok.

If you want you can change every values as you expectation.

Finally we got our expected image like below.