Add materiality in kangaroo?

At the moment the resulting structure in kangaroo acts more like cloth. What parameters (if at all possible) have to be change for it to act more like say a thin piece of steel?

Usually the Length(Line) or EdgeLengths components are used to control how much the edges of a mesh can contract or expand. If the Length or LengthFactor input are close or equal to the original (normalized) length of an edge, this means that the edge should keep its length. A value below the length means contraction, and one above expansion.

Moved to Kangaroo category.