I had a 386/40DX that could run Second Reality, and I was blown away. When I upgraded to a 486/66DX2 the first thing I did was run Second Reality, and I was shocked at how much of the demo content I had missed before from parts being truncated.

Also it’s worth noting that a lot of Second Reality’s source code got released to GitHub several years back: https://github.com/mtuomi/SecondReality and here’s an incredibly deep dive into the code: https://fabiensanglard.net/second_reality/

Finally, here’s some rare footage of the creation of the legendary demo: https://youtu.be/LIIBRr31DIU (English subtitles available)