So I am currently trying to weight paint the lips on my model such that they deform according to my Lip bones. I used Symmetrize to ensure that there are .L and .R groups, and the Mirror Modifier on my mesh has Vertex Groups checked. But when I go into Weight Paint mode and select one of these .L or .R bones, the weight painting is symmetrical. I would like it to be such that a bone on the right only influences vertices on the right. How may I go about achieving this?

Weight painting is symmetrical

Link to .blend file: https://drive.google.com/file/d/1QuQFWPfEyLrBtm0oP8SSyCSxa-LeHZ24/view?usp=sharing

Thank you for your help!

  • $\begingroup$ That's because you still have a mirror modifier on your model. If you apply that you'll be able to weight paint just one side of your model. $\endgroup$
    – John Eason
    Nov 19, 2020 at 11:15

1 Answer 1


The mesh object does not have enough vertex groups for the deformed bone names. The results of searching with the keyword "Lip" are shown in the Vertex Groups List in the figure.

Select Mesh Object, then Armature in Object Mode. Press the Ctrl+P key and select With Empty Groups.

enter image description here

PS: Lip2C.L is a non-deformed bone name and can be removed from the list.

  • $\begingroup$ Thank you tetii! $\endgroup$
    – SErysuwo
    Nov 20, 2020 at 3:55

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