I'm brand new to 3d modeling, I'm trying to model a low poly thing, and it seems quads on opposite sides of the mesh will indent along the line separating the polygons that make up the quad, or push out when I deform the mesh,always on opposing faces. (not sure how to describe the problem)
How does one make it so both sides of the mesh deform the same way?
Mirror modifier
>>566968
You could also use the Symmetrize thing, Edit mode -> Mesh -> Symmetrize