quickly reach [its] limits", whereas the Saturn's "complicated" hardware had the ability to "improve the speed and look of a game when all used together correctly". A major criticism was the Saturn's use of 2D sprites to generate polygons and simulate 3D space. The PlayStation used a different design, based entirely on 3D triangle-based polygonal rendering, with no direct 2D support. As a result, several analysts described the Saturn as an "essentially" 2D system. For example, Steven L. Kent stated: "Although Nintendo and Sony had true 3D game machines, Sega had a 2D console that did a good job with 3D objects but wasn't optimized for 3D environments." Several Saturn models were produced in Japan. An updated model in a recolored light gray (officially white) was released at ¥20,000 to reduce the system's cost and raise its appeal among women and younger children. Two models were released by third parties: Hitachi released the Hi-Saturn (a smaller model equipped with a car navigation function), while JVC released the V-Saturn'''. Saturn controllers came in various color schemes to match different models of the console. The system also supports several accessories. A wireless controller powered by AA batteries uses infrared signal to connect. Designed to work with Nights, the Saturn 3D Pad includes both a control pad and an analog stick for directional input. Sega also released several versions of arcade sticks as peripherals, including the Virtua Stick, the Virtua Stick Pro, the Mission Analog Stick, and the Twin Stick. Sega also created a light gun peripheral, the Virtua Gun, for shooting games such as Virtua Cop and The Guardian, and the Arcade Racer, a wheel for racing games. The Play Cable connects two Saturn consoles to for multiplayer gaming across two screens, and a multitap connects up to six players to the same console. The Saturn was designed to support up to 12 players on a single console, by using two multitaps. RAM cartridges expand the memory. Other accessories include a keyboard, mouse, floppy disk drive, and movie card. Like the Genesis, the Saturn had an internet-based gaming service. The Sega NetLink was a 28.8k modem that fit into the cartridge slot in the Saturn for direct dial multiplayer. In Japan, a pay-to-play service was used. It could also be used for web browsing, sending email, and online chat. Because the NetLink was released before the Saturn keyboard, Sega produced a series