7/1/2010 · Immersive Engineering is a mod created by BluSunrize and Mr_Hazard. It adds new Forge Energy (FE)-based machinery with a retro-futuristic feeling to the game, and many of the machines are a multiblock structure. Machines use either low, medium or high voltages with 256 RF/t being low, 1024 RF/t being medium and 4096 RF/t being high.