Mecanim Muscles tab has no effect?

So I didn't know until recently that the muscles tab when configuring a character actually does something, so I decided to try it out. If I understand correctly, this tab is for modifying joint limits (for example, if you had a bulky character whose big arms where clipping into his big torso, but the animations he was using were based off of a slimmer character, this would prevent that).

If I'm not mistaken, the following sliders are for preview purposes only, right?


And these sliders are what actually saves, right? Because you can only hit "Apply" after modifying these.


Because no matter what I set any of the additional settings to, nothing changes (yes I'm hitting "Apply").
I have my character running around with various animations, and none of the sliders at any value affect the character in any way. The sliders also don't affect any of the preview sliders either.
It's also worth mentioning that hitting "Reset" in the "Muscles" drop-down menu does nothing either.

What is going on?
- Is it bugged/broken?
- Do I not know how to use it properly?

Thanks


EDIT:
*sigh*
I feel stupid, problem solved.

 

You are not the first one to be confused by this tab. We

The first few slider are only to preview each muscle. You can preview each limit of your avatar and see if there is to much mesh interpenetration in which case you go on the next section to edit muscle limit.

in the Per-muscle setting you have foldouts that you can open to see the actual limit of each muscle, of course you can also edit them.

And the last section are retargeting parameter, how you would like twist bone to propagate their rotation, how much stretch is allow on arm and leg, at 100% it mean that you arm and leg can stretch up to 100% of their original length.

 

Welcome to the club - we almost have enough members to hand out hats!
I did the same thing once... once.

 

M

Is there any way to preview a specific animation while editing the muscles?
It's really annoying and time consuming to go back and forth between the edit tool and play mode to verify if you chose the right parameters.

 

No not yet, but this is on our road map

 

Does muscles settings works in 2020.1?
Trying to limit muscles of a run animation to look more stiff( wear tight clothes) but it has no effect even when using extreme values.
The animation is a blendtree, don't know if it's that causing the issue.
EDIT
Arms muscles works, legs don't.

 

Found the culprit, it's foot ik the problem.
Is it supposed to ignore the muscles completely?
Does foot ik also do feet matching between blend tree states?