Sorry for the late reply, but thanks for your detailed answer.

The problem i was trying to solve was that hair was sticking out from outside the hat, due to it being bigger than the hat.

I got the result that I wanted, instead of using clipping attachments, to hide parts of the hair, I instead use mesh deform to shrink parts of the hair to make it fit inside the hat.

This idea doesn’t use animations, it just moves the mesh vertices when a certain skin is applied.

Do you mean it’s better to use scale than to just move the vertices? Would using this method be bad for performance?

Thanks!

Also, is there a way to view the vertices while not in edit mesh mode? I find it a lot easier to understand what's going on, but due to the problems with deformed mentioned above, i can't do the edits of the deformation in edit mesh mode

See the video, is this really how it's supposed to work? I need to make mesh deformations, and toggle between deformed on and off, but when i move a key in deformed mode, it also moves the key in the non-deformed mode, which is very confusing.
If i disable edit mesh, move the vertex, and go back to edit mode, it didn't move, which is what i expect in the edit mesh mode as well.

It's very practical to do it right away inside the edit mesh, so i can more easily add more vertices when needed.
My version is 4.1.24.

According to the docs (https://en.esotericsoftware.com/spine-meshes#Edit-mode):
"When a vertex is translated, it changes the texture coordinates but does not change the position of the vertex outside of edit mode."

Also when i press "Reset", it breaks something in the animation, so the hair no longer moves along with the head. I think it's the same result as when i duplicate a skin and uncheck "Inherit timelines". It's also a bit confusing, as sometimes i want to reset and start over, but then the animation breaks, so i have to delete the skin, and make a duplicate of the original skin to keep the animation. I added another video below to show what happens. Just want to know if this is expected, and if there is a way to reset the mesh vertices, without breaking the animation.

I've had help from an animator to setup the animations, so i'm not sure how the connection is between the hair and the head, as the hair doesn't seem to have a bone..
Also the reason the hair looks so weird, is that this is the replacement solution for not using clipping attachments, where i instead change the mesh of the hair, to hide it behind a hat, which isn't visible in the spine at the moment.

Thanks, we will not go back to using the clipping attachments, so unfortunately we won't come back to that specific issue. But i have another issue that i'm posting in a separate thread, thanks

We decided to go for another solution where we add a mesh to head and hair, and then modify that with an animation, if the hat is worn. That should also be more performant than using clipping anyways, right?

I hope this helps someone else having problems with clipping attachments.

Also, is beta safe to use or will it become stable soon? Just so we don't get any new unexpected bugs, since it's a bit of work re-exporting all rigs (if we need that).

Thanks for the quick response!
Sorry, i mean "Mix and Match" which is referenced here https://en.esotericsoftware.com/spine-examples-mix-and-match and that is the concept we use.
I didn't get any error on export, unless it's hidden somehow, and i can try the beta, and always go back in case it would cause any problems.
Setting it up in a minimal project is pretty complex, due to the many parts, but i will try that as well if Beta doesn't solve it.

I also tried changing the clipping to use only 3 vertices, but it didn't seem to make a difference regarding memory allocation.

On another note, is the "Clipping" filter broken in the Tree view? Cause nothing happens when i click it, and the only way to find my clippings is that they luckily is named "clipping", like you see in the start of the video. Seems to be the same with Paths and Points. I'm on Spine 4.1.14, so it might be fixed in later versions, but I don't dare to upgrade now since we're late in production. (Unless it fixes the memory leak..)

EDIT: We've localized this to happen for all hats in the game, and for the hats, i believe we use clipping attachments. I remember reading that this might be memory intensive, but not that it would be a memory leak that would crash the editor. I hope this helps you localize what the issue is.

When our player is equipping a specific skin, which is made of various parts, the allocation goes up with 6-10Mb/second, and after about 1.5 minute, the Unity editor crashes.
When debugging this, i tried disabling SkeletonAnimation in the inspector, and with that, the allocation increase stopped. So it seems the memory leak is happening within SkeletonAnimation, but I'm not sure if we're doing something wrong when combining the skins, but we're doing it the HairMixAndMatch way.

We have other skins and combinations, that this doesn't happen with, so I'm not sure what is special with this one. Our rig is very complex with many different skins that we combine into clothes/equipment.

Also i tried to update spine runtime to the latest, (We had 2023-12-12 and tried 2024-02-07) but didn't make a difference.

We really need to find a fix for this as soon as possible.

See the attached video. Btw, we're using Graphy to monitor the mem usage.

I resized an animation to make it shorter, but the length of the animation doesn't follow along. There is no filter, and no keyframes beyond frame 24. How do I crop it?

Is there an attribute to show all skin placeholders as a dropdown in the same way as animations, slots etc?

[SpineAnimation(dataField:"skeletonDataAsset")]
public string walkAnimation;

Oh wow. Sorry, I totally missed that! Thanks for pointing it out.

I got this error which was hard to find the reason for:

Image for slot [slot: neck, bone: root] not found: neck-02

But after doing some digging in the many skins i used, i found the skin that had the error. It would be useful if the skin could be shown in the error message.

Thanks!

Thanks. I didn't even realize there were Spine Preferences in Unity!
However, I'm not sure if I'm doing this the right way, I still have the problem, see this video:
https://youtu.be/d8iTtrtFh_E

What I'm selecting between these inspector changes is the root object that the spine skeleton is a child of.

It seems to ignore both "Use global" and "enabled". It was set to disabled before.

After I apply a prefab that has a Spine skeleton, i still get this when checking the apply prefab button.
Why is that? It's hard to know if i made any changes or not.

If i review what has changes, it looks like this: