Sega Saturn game that was released in 1995, offered a more conservative approach to true 3D platforming. It allowed players to move in all directions, but it did not allow movement along more than one axis at once; the player could move orthogonally but not diagonally. Its characters were pre-rendered sprites, much like the earlier Clockwork Knight. The game played very similarly to 2D platformers, but it was considered a true 3D title, and let players walk up walls and on ceilings. It has a sequel called Bug Too!. In 1995, Delphine Software released a 3D sequel to their 2D platformer Flashback. Entitled Fade to Black, it was the first attempt to bring a popular 2D platform game series into 3D. While it retained the puzzle-oriented level design style and step-based control, it did not meet the criteria of a platform game, and was billed as an action adventure. It used true 3D characters and set pieces, but its environments were rendered using a rigid engine similar to the one used by Wolfenstein 3D, in that it could only render square, flat corridors, rather than suspended platforms that could be jumped between. Sony adopted an existing project by developers Naughty Dog: Crash Bandicoot. Crash remained Sony's unofficial mascot for the next several years before switching to multi-platform releases in the following console generation. Sega had tasked their American studio, Sega Technical Institute, with bringing Sonic the Hedgehog into 3D. Their project, titled Sonic Xtreme, was to have featured a radically different approach for the series, with an exaggerated fisheye camera and multidirectional gameplay reminiscent of Bug!. Due in part to conflicts with Sega Enterprises in Japan and a rushed schedule, and the game never made it to market. True 3D In the 1990s, platforming games started to shift from pseudo-3D to "true 3D," which gave the player more control over the character and the camera. To render a 3D environment from any angle the user chose, the graphics hardware had to be sufficiently powerful, and the art and rendering model of the game had to be viewable from every angle. The improvement in graphics technology allowed publishers to make such games but introduced several new issues. For example, if the player could control the virtual camera, it had to be constrained to stop it from clipping through the environment. In 1994, a small developer called Exact released a game for