Wow, I like the ''rabbit holes" of these extra lessons and videos, first time I have seen this and hope there are more in future courses. They helped me get a better understanding of normal mapping. It's still a little fuzzy but now I have an idea what they are and what they are used for. Looks like a lot more work involved though, I was hoping it was going to get easier, lol
Normal Maps are one of those things that if you don't work them a lot, you have to keep coming back to the lessons for a refresher when you need to use or create them. So it's ok if you are struggling with them, we all do, the point is to keep at it until it becomes second nature. Just that with Normal Maps it takes a while.