The 1st week of filming for The Fault in Our Stars was last week, and author John Green shared the six things he learned about the filming process.

1. It is amazing how many people are working on the movie, and how professional and organized they all are. There are like 100 people or something! It’s all amazingly efficient, and yet…

2. It’s amazing how much work goes into every single shot. These people work 12+ hours per day, and shoot at most a few scenes per day.

3. It’s amazing to watch good actors work, particularly young actors like Shailene and Ansel. How do they bring such nuance and depth to a performance? How can they understand these characters so deeply? It seems a little like wizardry to me.

4. The commitment to detail is amazing. I can’t wait until the movie comes out and I can be like, “LOOK AT [spoiler redacted]” and “DID YOU NOTICE THAT [spoiler redacted] IN HAZEL’S ROOM?”

5. It’s amazing how beautiful it all looks. Without getting into spoilers, the visual look of the movie—from the actors to the sets to the light—is very similar to a lot of what I imagined while writing, which is this very weird experience of feeling like your imagination has actually become visible. This is a very weird experience; maybe analogous to hallucination?

6. It’s amazing to think that the right people have come together at the right time with a very real shared passion for this story. I don’t know whether I have luck or providence to thank, but I am very grateful.

I wonder what he will learn in his next set visit.

via Fangirlish.