What to do when you can’t add metarig

When adding metarig fails in MMD Tools Append, it’s always because bone names are wrong.

I checked the model, and the bones are indeed named wrong:

• 右親指０ should be renamed to 左親指０
• 右親指０.001 should be renamed to 右親指０

親指０.R should be 親指０.L, and 親指０.001.R should be 親指０.R.

You can edit the bone names in this panel. Make sure to edit both names.

After renaming the bones, you can now add metarig.

credit: ぺこらマミー by 如月ふむ