The demoscene, while not unknown, is still quite niche amongst technologists and digital artists in the most of the world. It has a pretty thriving scene with dozens of get togethers worldwide (mostly in Europe) each year, is creative, communal, artistic, competitive, multidisciplinary, highly influential, and has a near infinite number of ways to engage with it. It has a long running internal culture, but is welcoming of outsiders willing to learn, and is kind of a "third way" to think about software and technology that can often radically change how you think about computing.

It's also a recognized UNESCO recognized intangible cultural heritage in at least half a dozen countries.

https://www.demoparty.net/

https://en.wikipedia.org/wiki/Demoscene