Photoshopped Thunderstorm

Sunday's sermon will be drawn from Psalm 77 which includes these lines:

When the waters saw you, O God,
When the waters saw you, they trembled,
      even the depths shook with fear.
The massed clouds streamed with water,
      the heaven echoed your voice,
      and your arrows shot back and forth.
Your pealing thunder was in the dome of heaven,
      your lightning bolts lit up the world,
      the nether world quaked and shook.
Upon the sea was your passage,
      your train upon the cosmic waters
      and so your heels were not seen.

(Psalm 77: 17 - 20 - Anchor Bible, Vol 17 - Mitchell Dahood)

This is the image that will be used in the powerpoint slide. The lightning bolts were drawn - not copied from a photo - using a set of customized brushes.

(click the image to see it full sized. thank you.)