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Sega often had multiple arcade boards running at the same time and never really dedicated their library and efforts on just one board. For example, while the Model 3 board was developed to replace Model 2 and was introduced in 1995, Model still kept going until 1998 and was phased out only after NAOMI hit the scene. Furthermore, Sega had their System 21 running from 1987 to 1996, while their H1 system was barely a blip on the scene in 1995, with it being their last Super Scaler board and had only two games. Other companies, like SNK with Neo-Geo, emphasized the amount of games on a board for a more economic approach. However, Sega had made good business in the arcades with excellent selection of timeless classics, but as we saw with the Dreamcast’s end, all things must come to an end.
Sega Hikaru hit the scene in 1999, before Model 3 was phased out and after NAOMI was put into public use, the Hikaru is almost a high budget, envelope pushing hardware to NAOMI’s ties to more budget conscious approach. Despite being derivative of NAOMI technology, it was expensive to produce due to its chipset, and it was hard to code for due to its intricacies. It featured a custom build Sega GPU with advanced graphical capabilities, almost a standard for Sega’s flagpole systems, with additional CPU, sound and other custom processors that utilised the expanded bandwidth and memory. All this was partially to enable the Hikaru to do Phong shading, which was the most advanced shading technique of the time, which essentially calculated the needed colour per pixel, making triangles on a model seamless and allowed better specular highlights.
The Hikaru was developed almost exclusively for Brave Firefighters, a 1999 arcade game.