I came across something strange whilst examining how the Hell Knight model from Doom Eternal was unwrapped. I swear I may have come across this before and possibly asked about it...? I'm not quite sure how this works. But also, is this common practise...?
Around the butt area, the top, bottom, and around the upper leg has cuts, but there's nothing there straight down the crack.
Hovering over the shell or selecting it, selects both sides of the upper leg. However, when looking at the unwrap itself, the far left side has no white line indicating there's a cut.
Moving the UV shell doesn't reveal a mirrored shell underneath either. So somehow both sides are overlapping...? But I don't understand how there's no cut down the crack/middle. I did notice the top and bottom cuts are not welded though, so I'm not sure if that's related. And if it is, how that works.
So if someone could shed some light on this, it would be much appreciated.