That happens to me too sometimes, and most of the time it's a problem with the "collar" and "shoulder".

It's a result of SASHA's slightly changed joint centres of collars and arms, in order to get a better bending.
Problem is, when you inject SASHA's joint centres, the joints' MatSpheres are moved along with it.

Now, if the creator of the clothing has set one of the two zones too tightly (so they _just_ enclose the geometry), it may happen that some vertices are no longer within the MatSpheres and are unaffected by the bend.
This causes the spiking as seen in your picture.

It's quite easy to fix:
Find out which movement causes spiking (in this particular case I'd say it's the "shoulder" actor; the up-down joint).

• Select the "shoulder" actor ! of the clothing !
• Open Poser's "Joint Editor".
  In the top-left corner, select the "Up-Down" axis (or whatever it's called: sometimes it's simply "zRotate")
• Two wire-frame spheres appear in the viewport (and also in the Hierarchy window if you have it open.
• Select the "innerMatSphere" (most of the time it's the smaller one, and "- it's - green..." *1
• Now (in the Parameters Palette) start increasing the zone's overall "Scale" by increments of 1 at a time until the spikes are gone. Most of the time you'll end up with a value between 102 and 110%
  (oddly Poser doesn't update the dial, so use the tiny arrows left and right of the "dial" and keep counting: 1-2-3-4...)
• repeat the same procedure with other bends that cause spiking (probably "Front-Back" and "Twist" because most vendors tend to use the same MatSphere setup for all three movements...)
• After all spikes are gone, use Poser's "Mirror Symmetry" to mirror your fixed setup from left arm to right arm (or vice-versa)
• Don't forget to save your fixed garment back to the library under a different name, e.g. "Jacket xyz S-16", so you only have to do this procedure once every time you first load a new clothing item and find it has the same problems.

Splendid!

Thank you for the feedback , and glad it did work for you.

K

You're correct @estherau:

It should be "350 S-16 Joint Centres" (the manual isn't fully updated yet, sorry!)

So use #350 and "Все будет хорошо"

Karina