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At the time where new capabilities came, the market was very fragmented. It was the 80486 era. Some PCs had low end graphic cards that couldn't do anything (like Tridents, etc) and the top of the line, at that time, was the ET4000 from Tseng Labs. A common problem is that you couldn't access the whole video memory at once, but by segments. Also, on some ...


Yes, there were, even though AF became available rather late in the day for DOS games (1996). However AF was never successful or even really relevant. In the nineties, supporting graphics resolutions beyond those defined by VGA was complex; see Fractint’s source code for evidence of that. Some programs had driver interfaces (notably, AutoCAD and Windows), ...


Just for a comedy fifth option: The somewhat unsung but interesting little thing known as "Simulcra"? I can't even remember much of it but it did involve piloting a small ship with limited movement around a sparse 3D landscape a bit like what you describe.


A simpler way of putting the above very good explanations is... they cheated ;) It's not proper 3D. If it was, you could face and move in something other than the four cardinal directions. Ever wonder why the movement feels so strange? It's because of that faked checkerboard motion as you move around the pitch. And that's the only "rendered" part; ...

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