Stretch, Elasticity and Tether Limit

The Stretch, Elasticity and Tether Limit decide the softness of a soft cloth.

The Stretch affects the entire soft cloth, the Elasticity focuses on the reflexive properties for the cloth, and the Tether Limit determines the level of stretching the soft cloth will exhibit.

Stretch

The Stretch determines how hard the cloth will be during collision. The higher the value, the harder the soft cloth is.

The illustrations below show the status of two soft cloth props with different Stretch values when they hit the floor.


Stretch = 100	Stretch = 10

Stretch and Object Meshes

Although Stretch decides the appearance of the soft cloth when it collides, the mesh also plays a big influence. For soft cloth objects, the mesh structure sometimes significantly affects the physics behavior.

Planes with different mesh structures.

When collision happens, the skin of the soft cloth starts to bend on the edges of adjacent faces. Therefore the more faces your object has, the smoother and more natural your cloth reaction will be. However, keep in mind that high-poly objects take up more system resources and take longer to calculate in terms of physics reactions.


Object with low number of faces.	Collision result.


Object with a higher number of faces.	Collision result.

Elasticity

The Elasticity setting is the level of stretching between two vertexes of a soft cloth. When this value is lower, there will be less stretching when one side of the vertex is subject to a physics force. Therefore, a lower value is more suitable for sturdy materials such as cotton or demin.