Complex sentence: The game was also built using the Lithtech 3.1 engine, instead of the Infinity Engine as many Black Isle Studios games had in the past, thus allowing for 3d graphics and real-time camera movement.
Split into simpler sentences: The game was built using the Lithtech 3.1 engine, instead of the Infinity Engine, as had been utilized by several of Black Isle Studios' earlier games. The new engine allowed "Torn" such features as 3d graphics and real-time camera movement.