Can't intrude face without "removing skin"

Support Modeling
1

I’m having trouble with the extrusion tool when trying to intrude a face.

01
011002×593 277 KB
02
021094×521 352 KB
03
031086×505 313 KB

As you can see the model clips through like an outer layer of the whole mesh when extruding. I cannot actually see an intrusion until I select and delete the two faces. And even when I can see the intrusion, I can tell that’s not how it’s supposed to look. It just looks… kinda fucked. Any ideas? I’m pretty new to blender. Haven’t used it since 2016.

2

Are you using a mirror modifier? If you are you might have to change the stacking order of your mods, or apply it first.

3

It could be that it has to do with the normals. Select everythin in Edit Mode and hit “Ctrl+N“