Hidden Symmetries

This is, in my view, one of the best pieces I've ever done, both in technical demand and in the final outcome. I completed it in one 5 hour session, the longest I've ever worked on something in one go, and I don't think I'll be doing it again in a while, I was pretty much hallucinating at the end of it! I'd love it if you would give me some feedback!

- Sketchbook Page 7
- Pens: Staedtler Pigment Liners
- Sketchbook: Stillman & Birn Epsilon Series Sketchbook
- Size: 13x21 cm (A5)
- Time: 5 hours