kloot ：Nice! Will these be available for those of us still using 3.8 as well?
In general we do not release updates for 3.8 any more. It's not unlikely though that the necessary changes are compatible with 3.8, so you might be able to simply use these files (or the complete URP UPM package) from the 4.0 package version then. We will post an update here as soon as it's available.
kloot ：Since (as I understand it) no tool exists to automatically update 3.8 content to 4.0, we plan to stay with 3.8 for this project.
Tools do exist, the Spine command line interface can import and reexport a project to a different version. But you will need to write a script once that issues the required calls. In general it's highly recommended to setup your project's workflow in a way to export via script anyway, instead of manually exporting every time. This can then be adjusted quite easily to batch-export to a newer version. If you need more information on that, you should easily find forum postings like this one with helpful references.
The shader compile error with URP 12.0 has just been fixed.
A new 4.0 spine-unity URP shaders UPM package is available for download here as usual:
Spine Unity Download: spine unity 4.0
