Interesting tidbit about ray sorting: Imagination Technologies had a GPU design in 2014 that had support for ray tracing, including a Coherency Engine: https:/

Interesting tidbit about ray sorting: Imagination Technologies had a GPU design in 2014 that had support for ray tracing, including a Coherency Engine: https://www.anandtech.com/show/7870/imagination-announces-powervr-wizard-gpu-family-rogue-learns-ray-tracing https://www.anandtech.com/show/7870/imagination-announces-po... But there wasn't enough interest in GPU path tracing yet.