It was so new and fun, I finished it in one day after purchasing it. I had a job that required me to implement 3D functions, so I found out while Googling. I had no idea how to implement 3D, but as I continued to watch the lectures, I learned how to implement it. As I watched each lecture, it was new and fun, I paid at 6 yesterday, and I watched it until 4 a.m. now. Thank you for the detailed lecture. ^^