Brilliant Shine Background
Make two copies of the last made layer and select Free Transform option to place the copies the same way shown next picture:
Merge Down all three layers containing the white rays (pres Ctrl button to mark out the necessary layers and press CTRL+E options). Select for the new layer this option: Filter>Blur>Motion Blur
Select one more option for the same layer: Filter>Blur>Gaussian Blur
Use the Pen Tool (P) and Convert Point Tool to draw that part on the ray that would be more voluminous.
The layer’s parameters: Fill 0%
Blending Options>Gradient Overlay
Make two copies of the last made layer and select Free Transform option to situate the copies above those two rays.
The picture is finished!
View full size here.