I found this answer, which I cannot comment on, so need to ask it again(sorry): Mesh disappearing when symmetrize it
I also am having the issue when trying to symmetrize, that faces disappear. At first I just thought maybe vertices were that bad out of alignment, so I refilled all the faces that deleted. However, when trying to symmetrize again(in the same spot) the faces will delete again. I then checked each vertex, and they were all exact mirror positions from 0. The origin itself was also at a perfect 0, working on an X-axis. I tried what that post answers, by setting the meshes origin to geometry. Still same effect, of faces deleting.
I also confirmed, then when using a X-mirror(editor option, not modifier), both vertices that mirror each other do move as expected, so technically they are symmetrized. Why then does symmetrize still delete faces(only on one side of X-axis)?
- I have no shape keys
- I do have vertex groups, which I think this area is locked(unlock did not change result)
- I am only selecting and symmetrizing a few vertices
- Any other questions on details, please ask