>>2882550You're SUPPOSED to adapt them, anon. It's far easier in MikuMikuMoving.
Tda is the most popular model type though, so a large share of motions gets made with those models, thus making them compatible with other (assuming the proportions and utilized morphs are preserved) Tda models out of the box. YYB and Sour vocaloids are also highly popular, primarily among the Japanese and Chinese creators, but in the end, there is such a spread that hoarding various source models makes a lot of sense even if you don't give a flying fuck about 99% of them, just to be able to load them and know for sure how your target model is supposed to be during any given frame.
Model-to-motion compatibility can be checked with a tool from PMX-VMD-Scripting-Tools (and it's very advisable to check every motion with it before use), and there is also the dubious VMDSizing tool that is supposed to automatically calculate offset adjustments based on the differences between the source rig and your target model, but I have no idea how to actually force the expected result out of it and just assume that its users know some trick that I don't.
