I was just looking for the meaning of "Lighten, a.k.a., sun bleached. Real patina". I understand the sun bit and the fact that it can age shoes. I'm not sure about the 'Real patina' bit. To me, it reads as though sun causes real patina - but from many responses on this page, the suggestion is that sun isn't particularly good for your shoes.
It all sounds to me as though 'natural' exposure to sun can cause patination but it is best not to let your shoes get too much sun. I'm still a bit confused.
Patina happens naturally, by oxidation and sun mostly. There are also patina created by usage. And then there are imitated patina by painting at different stages of production.
Lattanzi famously buried their shoes in an underground well with thick glass ceiling for years to achieve the natural effect.
On the men's poor imitations of patina, they could be done at different stages. At the leather dying, aka Ilcea Radica. Before shoemaking but after pattern cutting with dye. Or after shoemaking with either paint of cream.