Sega Hikaru
An evolution of the NAOMI hardware with superior graphics capabilities, the Hikaru was used for a handful of deluxe dedicated-cabinet games, beginning with 1999's Brave Fire Fighters, in which the flame effects were largely a showpiece for the hardware. The Hikaru hardware was the first arcade platform capable of effective Phong Shading.
Since it was comparatively expensive to produce, and most games did not necessarily need Hikaru's extended graphics capabilities, Sega soon abandoned the system in favor of continued NAOMI and NAOMI 2 development.
Read more about this topic: List Of Sega Arcade System Boards