why does the shoulder do this?

Most likely, the skin weighting in the border between your shoulder and arm is too tight. You have to smooth it out.

>>558510
Because neither is the mesh properly weightpainted, nor is it rigged correctly in my opinion. And while you're at it, try to research morphtargets too.

>>558510
You didn't have to mark it. It's pretty obvious that it's fucked up.

>>558510
There is a large number of reasons for this. Download already rigged models and study how they work. Also study some more. Study yourself when you move your arm in a mirror.

>>558514
are morph-targets/blend-shapes an interchangable term?

>>558510
God that thumbnail looks like a real woman with a deformity, horrifying

>>558538
Yeah blendshapes / shape keys / morph targets all the same concept

>>558510
Any rigging 101 video will teach you what is happening here unless this is some shit slide thread

You have to move the collar bone as well.

But this is also sfm, where every joint will look like shit.

As said above, bad rigging/weightpainting. There's a common practice of adding more vertex loops around shoulders/knees/elbows/any bending parts in order to be able to distribute bone weights properly. Perhaps your model could use an extra loop, or two.

>>558510
Crappy skinning

she has bonitis

>>558620
kek

>>558538
you need to improve your rigging
add more loop curs around joints and smooth out your weightpainting.

after that you can look at shape keys https://www.youtube.com/watch?v=f3JWNIkwBZ8

>>558510
Typical skinning job for a SFM port. Stop using it and use a better software that lets you easily create blendshapes to fix it.

>>558510
People can't move like that...when you lift your arm up straight it doesn't twist this much, the forearm twists and the shoulder raises. Learn to human first pls

>>558620

Her only regret.

>>558510

i always struggle with this in particular, i tried several different methods but the topology and extreme position make it a really hard pose to do

>>558510
go in front of a mirror and point your arm up. Notice ho our collarbone is also part of the motion, then feel shame that you ever thought you'd get away with just rotating the arm up.

>>560481
But its an ik rig i just moved the hand...

>>561389

your pole target might be poopy then

>>558514
>>559634
>blendshapes for arm movements
what the actual fuck?

>>559634
>>562313

Source users are just fucking retards that don't know how to rig and aren't even aware of the circumstances in which the engine will drop which weights they do have upon compile

You don't need blendshapes for mid poly shoulders if you actually understand rigging and posing