Let's say there is an existing game and it's common knowledge that it uses a particular feature of a mainstream graphics API (OpenGL, specifically). While I'm a programmer, I'm not much of a game developer type, so it's not completely clear to me where exactly that game puts that feature to use. However, out of technical curiosity, I would like to get a general description, if that's possible.
Can I ask such a question here, or would it be off-topic?