This is a lecture that explains in detail the biggest changes that need to be taken into account when moving from existing APIs such as D3D11 to D3D12. It would be better if it introduces a bit more diverse (including cases where errors occur) Resource Barrier utilization cases, various Root Signature setting cases for single objects, and Descriptor Table maintenance cases, as shown in the last lecture. Or, it would be good for students to upload various cases as pull requests to the sample code repository.