skarasuko In fact, it would be a bit difficult to handle a case where, for example, two characters normally move separately, and one character is temporarily placed between the other's drawing order for a hug animation. The idea of SpineSlotNode is to insert something into a skeleton, not to separate the rendering of the skeleton. In the case of spine-unity, the skeleton rendering can be separated by a component called SkeletonRenderSeparator, which can be enabled or disabled. Unfortunately, SpineSlotNode cannot be enabled or disabled in such way; it can only be toggled on and off to display the inserted nodes.
I thought this was an issue we should consider, so I have created an issue ticket below to add this enhancement: EsotericSoftware/spine-runtimes2689
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