Spine 3.8.99
Use Spine 3.8.99 if you are in late production, targeting older mobile hardware, or using a custom engine with a frozen toolchain. Use 4.2 only if you need physical automation or are starting a new 3-year project.
Would you like a deeper explanation of any specific feature, like , meshes , or export integration with a particular engine? Spine 3.8.99
Spine 3.8.99 is the final stable release of the Spine 3.x branch. It remains a critical version for many developers because it is the last version before the major transition to version 4.0, which introduced significant changes to the Spine Runtimes and project file formats. Use Spine 3