It sorta makes sense you can drop a SATA controller into your M.2/nvme slot, since it's just sitting there on the PCI bus. But you can also drop a SATA controller ... into your Wi-Fi card slot .. cause why not?
I'm re-making the hair of my Rei with another method, and i haven't had too much time to work with it, but so far it looks it could end up looking good, with less complexity and better shadows.