I've completed writing the first 7 scenes, and I'm working on 8. Right now, 18 scenes are planned for Chapter 4. There is no split pathing, so everyone will play every scene.
In Chapters 1-3, I'd previously waited until writing was almost done, before I started rendering. I'm changing that up this time, and as such, I've now finished rendering the first 3 scenes already! That includes over 3,000 frames of animation (Chapter 3 had 13,000 total, between the two split routes).
I will also start the process of coding in the next week or two. This will help me to get it right the first time, as I had several code bugs in C3, that resulted in having to issue a fix. That's not cool.