In NcCloth simulation, why do parameters like Bend and Shear stiffness not change cloth behavior at all?

After setting up cloth simulation with NvCloth, it seems like certain parameters do not effect cloth behavior in the slightest. I’ve see that other people run into this issue, but haven’s seen any solution to it.

It’s work in range 0-1.

try giving the bend constraint a value of 0.001, should fold nicely. A value of 1 will make it look stiffer. Same with shear, etc. Still trying to figure out what the Vertical and Horizontal constraints do…