#i imagine they trade darkvision for low-light as a compromise

[steamclouds]

So for my own canon I like to imagine that infravision from earlier editions still exists, but it's exclusive to the races that live deep in the Underdark, so drow, duergar and deep gnomes. Maybe it's a byproduct of constant faerzress exposure and adaptation since it allows for much better vision than the "shades of grey" that darkvision allows.

And now I'm imagining the shock everyone has in camp when the companions see Voradras use it for the first time and all they see is two glowing red dots floating across the campsite in the dead of night.