I can see you're experiencing issues with Skeleton Baking in spine-unity 4.3-beta. Based on the error messages in your screenshots, it appears there are problems during the baking process.
Important Notes about Skeleton Baking:
Skeleton Baking is a specialized tool and not the recommended way of using Skeletons in spine-unity. It's not used for regular SkeletonAnimation, SkeletonMecanim, or SkeletonGraphic components. Instead, it bakes a skeleton down to a less flexible Prefab with a fixed hierarchy of Transforms with MeshRenderers and compatible animation clips.
Common Issues:
Many of Spine's features don't exist in Unity's Animation system, so they can't be translated and are ignored during the baking process. This can cause errors if your skeleton uses unsupported features.
What to Check:
Please verify that your skeleton only uses supported features for baking. A detailed list of supported and unsupported features can be found in the SkeletonBaker.cs file:
EsotericSoftware/spine-runtimesblob/4.2/spine-unity/Assets/Spine/Editor/spine-unity/Editor/Windows/SkeletonBaker.cs#L44-L67
Troubleshooting Steps:
- Check if your skeleton uses any features listed as unsupported in SkeletonBaker.cs
- Since you're using the 4.3-beta version, ensure you're using the latest beta release (updated 2025-10-20)
- Try baking a simpler skeleton first to verify the baking system works correctly
- Consider using regular
SkeletonAnimation components instead of baking, as this is the recommended approach and supports all Spine features
If the issue persists and you need baking to work, please verify which specific features your skeleton is using (constraints, blend modes, etc.) as these may not be supported by the baking system.
