Why are my hooks and sewing not holding my cloth in place? I’m trying to solve the problem detailed in

How can I make my cloth sim show tight folds?

but I’ve run into an issue where the hooks in my cloth are not holding it in place when my monkey head presses against it.

Ideally, it should be working similarly to this:



…but instead, I’m getting this behaviour…
0001-0080.mkv (13.4 KB)
…where the cloth is torn from the pinned points and blows away from the pressing object.

Can anybody explain why the cloth is not pinning correctly? Absolutely baffled here.

Blend-File: 

Demonstration of Vertex Group:
While I had created Vertex Groups, I had failed to assign specific vertices to the groups.