Godot Engine: Soft Body Simulation Effect (GDScript)
This isn't guide, it's just experiment:)
Don't believe everything you read, it's only tags:
Easy dynamic breast physics in Godot 2.1;
How to make woman breast physics in Godot 2.1;
Soft Body, Breast Bounce in Godot 2.1;
Easy method of adding SoftBody physics.