This is quite neat: Second Reality C++ port made it possible to compile the demo to run in a web browser: https://www.jsr-productions.com/secondreality/index.html (click inside the view to start it)
- Main page: https://www.jsr-productions.com/secondreality.html
- Source code: https://github.com/XorJS/SecondRealityPlusPlus
- Original Second Reality (1993) demo at pouet: https://www.pouet.net/prod.php?which=63