Yes, back then graphics and gameplays were carefully designed in consideration of the 3D engine limits (eg. doom and its raycaster, or outcast[1] and its voxel-like engine). Today the polygon-based rendering seems to be the only viable technology (and it is hardware accelerated). I believe it's taking away all games' originality.
[1]http://en.wikipedia.org/wiki/Outcast_%28video_game%29#Gamepl...