The feature was discontinued many years ago. Unfortunately there's nothing to replace it, it was just removed altogether.
Unless you can find some 3rd party software to do it (techically it's possible), or have acces to the game code, there's not much you can do.
If you have an old PC and still have the old card, it should still work with old drivers and games that can run on it.
CPU: AMD Phenom II X4 810 @ 3120MHz | RAM: Kingmax 2x2GB DDR2 800 @ 833MHz| MoBo: MSI K9A2 CF v1.0 (BIOS: 1.D)| GPU: Asus HD 6850 1024MB (DirectCu) @ 835/1135MHz | Display: L24FHD | PSU: PC Power & Cooling Silencer 750 Quad | OS: MS Windows 3.11 Pro x64