Immersive Engineering Official Feed The Beast .
Immersive Engineering is a mod created by BluSunrize and Mr_ adds new Redstone Flux (RF)based machinery with a retrofuturistic 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.