Help me look at the outline problem ！！！

LZL

When a skeleton needs to render multiple materials, the resulting texture samples are misplaced when a single material is generated through the Runtime Repackaging function

Spinebot

When using the Runtime Repackaging function in Spine to generate a single material for a skeleton that requires multiple materials, you may encounter issues with misplaced texture samples. This is because the outline shaders can incorrectly outline each submesh instead of the whole skeleton. To resolve this, ensure that only a single material is used by packing your atlas accordingly. If this is not possible, you can use the RenderCombinedMesh component to re-render your combined skeleton mesh with an outline-only shader, such as Spine/Outline/OutlineOnly-ZWrite for the Built-In Render Pipeline or Universal Render Pipeline/Spine/Outline/Skeleton-OutlineOnly for URP.

Harald

@LZL Sorry that Spinebots answer is not quite matching your problem, it unfortunately can't process images (yet). The lower half however might still be useful, so I'm leaving it as-is.

As your skeleton also shows incorrect atlas regions, and alternating outline- and normal materials:

What does your initial skeleton setup look like material-wise?
What materials are active before repacking?
How did you create the outline setup on your skeleton before repacking?
What render pipeline are you using? I assume you're using Built-In Render Pipeline, is this correct?