Hi, it's my first time with muscles. I have set a muscles sim with default values as the muscle documentation shows and I got all the muscles attached to the bones in the "tendon" (start and end of the muscle) but the muscles stretches til it falls to the floor (with the tips still attached to the bone).
The scale is allright. It's real scale 1:1.
I cranked up the stiffnes, fiber strength, set 10 substeps and the tet size is 0.3(smaller than default 1) but it's the same.
Anybody worked with the new muscle system?
There's no node missing I don't know what is wrong (substeps, scale, stiffness and fiber strength values are crancked up but does the same)

It doesn't look like you have any MuscleToBone constraints?
Do you have a MuscleConstraintProperties node in your setup? Is the MuscleToBone constraint stiffness too low?