In this approach, the body is modeled as a set of point masses (nodes) connected by ideal weightless elastic springs obeying some variant of Hooke's law. Spring/mass models Two nodes as mass points connected by a parallel circuit of a spring and a damper. The simulation of volumetric solid soft bodies can be realised by using a variety of approaches. This example has been created with Blender. Softbody objects react to forces and are able to collide with other 3D objects.

Several physics engines currently provide software for soft-body simulation. Generally, these methods only provide visually plausible emulations rather than accurate scientific/engineering simulations, though there is some crossover with scientific methods, particularly in the case of finite element simulations. The scope of soft body dynamics is quite broad, including simulation of soft organic materials such as muscle, fat, hair and vegetation, as well as other deformable materials such as clothing and fabric. While the relative distances of points are not fixed, the body is expected to retain its shape to some degree (unlike a fluid). Unlike in simulation of rigid bodies, the shape of soft bodies can change, meaning that the relative distance of two points on the object is not fixed. The applications are mostly in video games and films.

Soft-body dynamics is a field of computer graphics that focuses on visually realistic physical simulations of the motion and properties of deformable objects (or soft bodies). Computer graphics simulation of deformable objects

The sims 4 soft body skin