SGI IRIX Onyx was the most powerful 3D graphics hardware available in the first half of the 1990s. $~250k and occupied a small room on its own.
We had one at GMD-FIT for developing 3D augmented reality applications in C++, and occasionally we played Doom on it over LAN.
Approximately 5 years later, 3D PC graphics cards (such as the legendary FireGL for $~250) were at least as powerful as the Onyxes.
In case you wonder how we programmed our stuff in #C++ on #SGI IRIX: We actually avoided #IRISPerformer after 1995.
For many applications, we used an #3DGraphicsFramework called #VTK on top of #GL and later #OpenGL.
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