English explanation of knee structure.
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@Veratai
Actually, I tested the same structure on the elbows to see if I could get a more elbow-like feel, but it seemed like there would be problems when twisting them, so for now I'm only using it on the legs.
I think Vroid has problems with the topology and bone placement, which is why the weights are strange...
hm.. wonder if the elbows require a similar treatment.. they too get somewhat 'wrong' in deep arm bend poses, or twists
but vroid is full of those micro-issues with weights
so you're saying it needs an extra shin bone, facing up? and using what 'lower leg' used to have for weights?
×～without weight to the uppeleg
○～without weight to the lowerleg