Been thinking of building a nixie tube clock, but both the high cost of desirable IN14 / IN18 / Z568 tubes and the limited lifespan has put me off.
And then I came across this eBay listing. It looks very convincing, but of course photos can be deceiving. With "RGB" in the title, I expected mini OLED displays to simulate a nixie tube display, but this looks like it has some genuine 'depth' to the display.

Can anyone shed some light on how these modern look-alike 'tubes' look so much like the real thing? Or is it sleight of hand with the photos?