Thanks again for great tutorial :)

I just wanted to explore this more, and I focused on pairing big letter in center with brushes so it could merge into one crazy shape :)

• Adding two types of fills on brushes gave interesting results. Also giving some opacity to random elements made whole picture look quite deep. 
  
  
• Instead of adding random swirls or lines I decided to make sort of organic shapes blending from one to another.
  
  
• On the back I've placed dark photo corresponding with whole shape - instead of putting bright circle or something like that.
  
  
• Finishing touches was made with red color which brighten the letter "S" and shows bezier curves.

Project:

Process:

Details:

Hope you like it :)