Subsurface Modifier Is acting strange So I am new to blender and am following the 2.8 donut tutorial (what a surprise haha). I got to the step of the subdivision surface modifier, but when I add it to the donut to smooth things out a bit my donut looks VERY weird in edit mode (note that Blender Guru's does NOT look like this):


Any help in fixing and understanding this issue would be great!
The vertices in this area are causing an indent in the surface. When the subsurface modifier is applied, the subdivided surface has a smoother transition and intersects the coarse mesh in edit mode. This is completely normal.

A basic torus


One vertex moved along the z-axis to create a dent


You can hide the subsurface modifier for the edit mode.