5. Duplicate the Background layer (Ctrl+J/Command+J) so you have two layers. Select the top copy and change the Blend Mode to Color Dodge using the menu in the Layers palette.

6. Duplicate the top layer and choose Filter > Blur > Gaussian Blur with a Radius setting of 6 pixels. Change the Blend Mode on this layer to Pin Light. You won’t see the blur until you apply this new Blend Mode.

7. Duplicate the topmost layer again and change the Blend Mode to Overlay. Then link all the layers together and choose Merge Linked from the Layers palette options menu. Change the name of the Background layer to Layer 0 by Alt-double-clicking/Option-double-clicking the layer name. It will change to Layer 0 automatically.

8. Create a new layer below the orange spiky ball layer and fill it with black. Then change the Blend Mode of the layer above it to Screen. This shouldn’t change anything yet; don’t worry.

9. Duplicate the topmost layer five to ten times, positioning each copy randomly toward the left side of the canvas. Changing the Blend Mode to Screen in the last step allowed the black areas of the layers to be hidden so we can see through to each layer below it.

10. And you’re done. Good luck!