For me, I tend to be really drowsy the first 1-1.5 hours and have trouble getting out of bed and getting myself together, but once I've got myself washed and dressed and have had my breakfast and, very importantly, my tea, and start to be properly awake - after that mornings are the most productive time of the day for me. Early-to mid evening is another good one. But currently I'm muchly helped by the fact that I don't actually have a fixed schedule and don't need to be anywhere. I am... in between jobs as they say, or maybe in between careers - a bit of a long-term project. When I was working full-time, it was hard to get in writing on the mornings of work days, because I had to get up earlier than was comfortable for me, and thus didn't really get over the drowsy phase before I had to get out.

That sounds like a productive day of writing - rewriting and adding things that contribute to important things is very good. Good luck with the next scene!