FreeBrushes brings us a nice package of Brushes de Sun rays with which we can get effects as beautiful as the ones you can see in the image above.
These brushes are totally free and as your own car indicates they are ideal to achieve the effect of a sunrise or a sunset when the Sun is half hidden and we see that halo of rays coming out from behind the mountains ... (as in the flag of Japan).
Source | Sun Ray Brushes