Insect night vision and IR vision

The insect line only receives the benefit of high night vision, which makes it very improbable for them to acquire infrared vision (prereq full night vision), which is marked as a characteristic mutation.

Mutations that are flagged in-category can pull prereqs. If it calls for IR and you’ve only got HNV, it should give FNV. Agreed that it’s not as certain as making FNV in-category, as it’s possible you could get canceled out for not-in-category before getting IR, but then part of the point of mutation is that results are NOT guaranteed.

Not a bug.