>>2846090It is doable, in terms of MMD, and it requires model editing. What you want is the question. You can either have a leg that works normally, with some physical weights thrown in (which will prevent you from using SDEF, which I still continue to consider the best bet for knees and ankles), or you can have dangling ragdoll sausages.
>>2846021After heavy consideration, I think I'll share the whole edit, maybe this will improve the adaptability of my motions that use relevant bones.
https://bowlroll.net/file/315230 