Feral Child should grant darkvision if low-light vision is provided by any prior source

[reonZ]

In the instance of a background like Feral Child, a character is supposed to gain Darkvision if it already has Low-Light Vision.

Currently in the system, only an Ancestry source of Low-Light Vision is considered but shouldn't the Heritage be seen as an equivalent ? Both being linked and part of the origins of the character.

[stwlam]

You also gain low-light vision, or you gain darkvision if your ancestry already has low-light vision. You can choose from dhampir feats and feats from your ancestry whenever you gain an ancestry feat.

[reonZ]

Feral Child doesn't have this specification though, it only says

You gain Low-Light Vision (or Darkvision if you already had Low-Light Vision)

[stwlam]

Then what does this have to do with ancestries vs heritages?

[reonZ]

The Feral Child background has a predicate of "self:low-light-vision:from-ancestry" for darkvision and therefore doesn't work for Low-Light Vision given by Heritage

[reonZ]

I didn't know that Feral Child was the exception.