!nostupidquestions@lemmy.world

Not sure how much it applies to IRL genetics, but I learned through Blender Principled Hair shader and its official manual (yeah, I'm aware this is a very strange way to learn something related to genetics and biology, and may sound a lot like non-sequitur before the subject of the question) that the ratio between eumelanin and pheomelanin (which seems to plays a role in hair redness) for deep red hair is somewhere in-between (i.e. somewhere around 50% or more) a blonde hair and a black hair (which makes sense if we were to think about it: red hair is neither brighter as blonde hair, nor darker as brown/black hair, it's something in-between). I had to tinker with these values in order to conjure a character (specifically, Lilith, who is often seen/believed among ritualistic practitioners, including by myself, as red-haired) with a black-to-red hair.

Therefore having the exact balance needed for deep red hair to happen naturally seems mathematically/statistically rare (especially due to the biological dynamics between recessive vs dominant genes).

Also, (now talking about something outside 3D art, from more IRL-grounded observation) red-hairedness seems to be often present alongside zygomatic rubor/blush (as in, redder cheek, seen among e.g. some Irish people), likely due to the same genes which give the eumelanin-pheomelanin ratio to be closer to 50%.

Again, I'm not knowledgeable about the subject matter, I'm just sharing something I've observed from my whole neurodiverse hyperfocused perspective, an esoteric artist who've been doing art depicting Lilith in Her anthropomorphic manifestation as a powerful red-haired entity and have been pivoted to 3D art in Blender recently, and red-hairedness calls to my attention precisely because it reminds me of Lilith and how She often manifests during my gnosis.