To understand why this plugin was significant, you have to look at the hardware of the era. In the late 90s, the graphics card market was a battlefield. We had 3dfx Voodoo cards, early Nvidia Riva TNTs, and ATI Rage cards. Not all of them supported the newer Direct3D7 or Direct3D8 standards efficiently.
: Certain games that suffered from crashes or copy-protection errors in later versions of Project64 were often noted to run more reliably using the Direct3D6 v1.5.2 plugin. Jabo-s direct3d6 1.5.2 plugin 97
Retrospective: Project64 and Jabo, obsolete and consequential To understand why this plugin was significant, you