I got some help with the somewhat difficult parts through the lecture. I think it will be very helpful for those who are learning DirectX for the first time. In particular, the explanation of transform was really good. The engine structure is also very good. It is enough that you don't necessarily have to go to Game Academy. However, I think it would be difficult to make a portfolio without collision. Except for a few things related to collision, deferred shading, LOD, etc., almost everything you learn at Game Academy is explained. Disappointing points I feel like there are a lot of unnecessary details. When I listen to the lecture, it seems that they record offline classes and sell them on Inflearn. So it doesn't feel like only the necessary content is conveyed, and there are a lot of repetitive contents and parts that don't need to be explained. I feel like the lecture is unnecessarily long and not edited much. It would have been better if there were editing/revisions like writing and reviewing, and it would have been better if there were more notes.