Is anyone following me into Silicon Graphics workstations and wants to chat about how rad they are?pic.twitter.com/4KYba3Vmvd
Serious SGI talk: As far as case design goes, they're amazing. As far as 3D performance goes, it depends heavily on what the system is fitted with. An R4k Indigo with Light graphics or an Indy with Newport will blow the doors off a contemporary PC on CPU loads, sure.
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Even so, graphics-wise, the Light and Newport boards weren't much better than contemporary PC SVGA cards that had integrated BitBLT functionality. The majority of 3D rendering was CPU-driven in those cases.
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Depth buffering was faked on XL/Newport boards on the Indy by loading a 32-bit pixel mask register, meaning any 3D geometry had to be drawn in horizontal 32-pixel spans, max. That's all you got unless you were using painter's algorithm and ate the overdraw cost.
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Love SGI machines and have maybe 10 between 4D/780GT to Octane2. Always dabbled with IrisGL & OoenGL on them. Hardware had really interesting unique features like alpha blending on top of live video
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The funny thing is, the technical magic was in being able to ingest live video, and having enough bitplanes for proper alpha blending at all. The act of blending geometry against live video was just another thing you could do at that point.
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