Hello Dongjin! Nice to meet you too!
Right now I'm working in extracting relevant information from 3D geometry (like area, volume, etc...) to use in a validation system, so I'm not working with rendering stuff at all (ok, maybe just basica stuff, like plotting some geometry on the screen, nothing fancy), but it is on the roadmap here, and certainly it's a job for a graphics programmer, beeing it on a game engine or in another scenario. By the way, I'm always looking into game-related articles and code to do what I need, since a lot of game techniques can be used and/or adapted to other fields where computer graphics is applied. And to tell the truth my objetive is really to work on games.