I've noticed my pawns with the scarless gene, on top of gradually healing scars acquired prior to gene implantation, simply never sustaining new scars at all - even brain damage, which should permanently scar every time, heals up like any other normal injury if the scarless gene is in play first. As the description and this page seem to only depict the former behaviour, I was wondering if anyone else has noticed this, or if my game is merely too heavily modded for its own good.