5 answers · asked · Lesson: Cartoon Head Pt. 6 - Ears · Course: Blender Mesh Modeling Bootcamp

Why does smooth move my mirror axis vertices?

When I smooth vertices, it moves the mirror plane vertices. So far I've gotten away with just selecting all of them, scaling X to 0, and then moving them to X=0...but with the nose geometry, the vertices are too close together to be easily selectable, and so my work-around has fallen short. Why is this happening? How can I "lock" those vertices to the YZ plane so this doesn't happen?