Delta Force and Commanche were among games that drew me to alternative engines.  Doing a CPU-based renderer gives you lots of new tricks and abilities, things you can&#x27;t do with simplified massively parallel architecture like GPUs.  Many games have a far view distance now (see Uncharted or Just Cause) - but doing it in a dynamic world that is procedurally generated in realtime with solid geometry is a whole other bag of cats. :)