微软公司于1996年为PC开发的API，与Windows 95 、Windows NT和Power Mac操作系统兼容性好，可绕过图形显示接口（GDI）直接进行支持该API的各种硬件的底层操作，大大提高了游戏的运行速度，而且目前基本上是免费使用的。由于要考虑与各方面的兼容性，DirectX用起来比较麻烦、在执行效率上也未见得最优,在实际3DS MAX的运用中效果一般，还会发生显示错误，不过总比用软件加速快-Microsoft in 1996 for the PC development API, and Windows 95, Windows NT operating system compatibility and Power Mac, and can bypass the graphical display interface (GDI) API directly support the operation of a variety of underlying hardware, greatly improving the game speed, but now is basically free. Due to consider the compatibility with various aspects, DirectX is too much trouble with it, also might not be in the implementation of the optimal efficiency in the use of the actual effect on 3DS MAX general, an error will occur, but faster than software acceleration