Check out “Submergence” and “Volume 4096”
http://www.squidsoup.org/blog/projects/
They’re not (to the best of my knowledge) using FastLED, but it’s some nice eye candy.
Don’t let your brain interfere by calculating the cost.
Pretty impressive, but I think they were struggling processor wise, especially when you compare it to ‘Submergence (2013)’ on display in Norway. That is much slicker.
I saw a display recently that had roughly 4000 leds - and I could tell what the led chipset was by the wiring (ws2811 or tm1804), but I could also tell how they had wired it by the frame rate - at nearly 120ms per frame, there were getting barely 5-8fps, and it looked terrible 