We are using the spine plugin in a project of ours, but we have run in to some issues with colors (tinting/opacity). When I look at the plugin from github, I can see that it both parses and tries to set the opacity map to use the generated texture, but nothing shows up in-engine. I don’t know if this is something that has worked previously (this project is our first with spine), but I can’t seem to find any info/fixes about it.
So I don’t think this ever worked - I believe we only update the transforms of the bones we don’t do color / opacity animation on the materials. If that sounds like something you’d be willing to write yourself we wouldn’t object, but I don’t think we can do this any time soon as we have other tasks in our current roadmap.