https://blog.faceutil.com/2017/03/10/%ec%9c%88%eb%8f%84%ec%9a%b010-illusion-%ea%b2%8c%ec%9e%84%ec%97%90%ec%84%9c-%eb%a0%89%ec%9d%b4-%eb%b0%9c%ec%83%9d%ed%95%98%eb%8a%94-%eb%ac%b8%ec%a0%9c-d3d9-dll-%eb%ac%b8%ec%a0%9c-%e3%82%b0/