Blender- Shrinkwrap modifier issue with retopology

Yogev

https://i.ibb.co/4j3TB7n/Screenshot-1.jpg

I started to do retopology for a character, and there is a weird issue when I try and connect things together. I have the clipping option turned on for the Mirror modifier, but the two sides don't always clip at the middle.

https://i.ibb.co/P5MrwCx/Screenshot-2.jpg

I thought it might be a problem with the Mirror modifier at first, but it seems to be the Shrinkwrap modifier that cause the issue. When I turned the Shrinkwrap, the clipping works fine.

https://i.ibb.co/TvtKvPt/Screenshot-3.jpg

Does anyone know what can cause it, and how to fix the issue?

kanga

I find the mirror clipping works best in vertex mode. Make sure your origin is at 0,0,0.  Just a general note, use snapping set to faces and closest then Project individual elements in combination with shrinkwrap.

Go to vid for the setup: https://www.youtube.com/watch?v=CuQzPDs99yM

RN

Something that can help when your original mesh looks very different to the shrinkwrapped result is that you can apply the Shrinkwrap as a shapekey, then delete all shapekeys first and then delete the shrinkwrap shapekey last (so it becomes the base mesh), and then adding a new Shrinkwrap modifier to keep working. This "stabilizes" the mesh.