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It’s worth noting that this same restriction of not being able to do perspective transformations is also one of the defining characteristics of PlayStation 1 graphics. And the workaround of subdivision is also the same workaround PS1 games used.

More reading: https://retrocomputing.stackexchange.com/questions/5019/why-...

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It is also a limitation that many initial DOS 3D software rasterized games had (e.g. Descent.)

This is because perspective transform requires a divide per pixel and it was too costly on the CPUs of the time, so they skipped it to get acceptable performance.

It's also commonly known that Quake only did a perspective divide every 16 pixels.

It's funny that, in today's CPUs, floating point divide is so much faster than integer divide.

Huh that’s so crazy. I had that in my head as I was reading the article. I was thinking about some car game and the way the panels would look when it rotated in your “garage”.

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