Lain MultipleInstances

This is most likely a incompatibility between SkinPort and that mod. Unfortunately, I am no longer updating SkinPort for compatibilities, you should just remove SkinPort if you want to play...

Yes, but the mod currently does not do that. The mod is licensed under MIT license, you can modify it to make it sync config to client on connection. Also,...

Sorry, I don't really want to patch this mod for every incompatibilities... This mod is licensed under MIT, please feel free to fork it, and make your own patches.

Can you provide versions of both mods? and possibly a modlist? I remember playing botania myself didn't have this problem.

The mod does not transfer skins between clients, you need both skins on both clients. Alternatively you can setup a custom skin server.

Did you also have RenderPlayer API installed? I remember adding compatibility with SmartMoving through that API.

It is possible that the Advanced Skin Customization mod is incompatible with OfflineSkins, you can test this by removing it temporarily. Do you put those skin files on all client...

Unfortunately, there are no logs for what skins are applied at runtime. From their websites (translated using google, i can't read Russian), they seem to provide skin services through that...

You should be able to detect if they are actually getting hijacked by my mods' ASM hooks here: https://github.com/zlainsama/OfflineSkins/blob/master/src/main/java/lain/mods/skins/init/forge/Hooks.java Here are the transformers: https://github.com/zlainsama/OfflineSkins/blob/master/src/main/resources/transformers.js

You can add some logs to the Hooks.java and compile then log in to the game with the launcher you are using to see if the game's logic is actually...