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== NPC Skins ==
Custom NPC skins are something that many server admins have asked for ever since Citizens was first released. In recent Minecraft versions it has become possible to control an NPC's skin via the new player packet system. By default an NPC will have the default Steve or Alex skin. You can set an NPC's skin by using the <code>/npc skin [NAME]</code> command. For example, <code>/npc skin mcmonkey4eva</code>
Custom NPC skins are something that many server admins have asked for ever since Citizens was first released. In recent Minecraft versions it has become possible to control an NPC's skin via the new player packet system. By default an NPC will have the default Steve or Alex skin. You can set an NPC's skin by using the <code>/npc skin [NAME]</code> command. For example, <code>/npc skin mcmonkey4eva</code>


== What's the best way to set a custom skin? ==
== What's the best way to set a custom skin? ==
Set your skin to the desired skin. Go to your NPC and type <code>/npc skin <your name></code>. Change your skin to the next skin for the next NPC and repeat the process.
 
If you want to set a custom skin (one that isn't already on a player), use <code>/npc skin --url [image]</code>. The "[image]" part must be filled with a valid public image direct link. "public" means it's on a web host (you can just use Discord or [https://imgur.com imgur] or whatever else) and "direct" means it's a link that ends with ".png" containing the raw image (not a link to an album or similar. Imgur by default gives you an album link, and you have to right click -> copy image URL).
 
For example: <code>/npc skin --url https://gamepedia.cursecdn.com/minecraft_gamepedia/3/37/Steve_skin.png</code>
 
Note that the <code>--url</code> feature is internally backed by [https://mineskin.org/ Mineskin], and in some cases it may be helpful to use their website directly.
 
If you want a '''slim model''' (aka "Alex model") (3-pixel wide arms instead of 4) from a URL, it might be helpful to directly upload the skin image to [https://mineskin.org/ Mineskin] and use the model choice option on the page.


== Other Options ==
== Other Options ==
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Note that some sites like https://mineskin.org/ let you generate values for the <code>-t</code> option.
Note that some sites like https://mineskin.org/ let you generate values for the <code>-t</code> option.
== Mirroring A Player's Current Skin ==
If you want every player to see their own current skin applied to the NPC, install [https://denizenscript.com/ Denizen] and then use the command <code>/npc mirrorskin</code>. You can also have the name mirrored via <code>/npc mirrorname</code>.
== For API Users ==
If you use the Java Citizens API, you can control skins on NPCs via <code>npc.getOrAddTrait(SkinTrait.class)</code> and calling a method like <code>setSkinName</code>. Refer to the [https://jd.citizensnpcs.co/net/citizensnpcs/trait/SkinTrait.html SkinTrait JavaDoc] for more information.
'''Note:''' you can't (and shouldn't) set from image or URL directly via Java API. Instead, upload your image to [https://mineskin.org/ Mineskin] and save the texture+signature data (store them in a string or a config file), and set that with <code>setSkinPersistent(uniqueId, signature, texture)</code>.


== Common Issues ==
== Common Issues ==
Many issues can cause the skin system to fail. If you are experienced issues, please ensure the following:
Many issues can cause the skin system to fail. If you are experiencing issues, please ensure the following:
* You are running a fully up to date Spigot server acquired from https://www.spigotmc.org/wiki/buildtools/ running the latest version of Minecraft. (Outdated servers are unsupported!) You can use <code>/version</code> to check the version of your server.
* You are running a fully up to date Spigot server acquired from https://www.spigotmc.org/wiki/buildtools/ running a supported recent version of Minecraft. (Paper also generally works). You can use <code>/version</code> to check the version of your server.
* You are running the latest dev version of Citizens2 from http://ci.citizensnpcs.co/job/Citizens2/ Please verify the specific build number (NOT the file version name) You can use <code>/version citizens</code> to check this build number.
* You are running the latest dev version of Citizens2 from http://ci.citizensnpcs.co/job/Citizens2/ Please verify the specific build number (NOT the file version name) You can use <code>/version citizens</code> to check this build number.
* You have a dedicated server (not a shared hosting service!)
* You have a dedicated server (not a shared hosting service!)
* You own your server's IP entirely (no other ports on the server are used by other minecraft servers! (Unless they're your own servers as well.))
* You own your server's IP entirely (no other ports on the server are used by other minecraft servers! (Unless they're your own servers as well.))
* You are running your server in ONLINE MODE (offline mode servers won't work!)
* You are running your server in ONLINE MODE (offline mode servers won't work!) (note that if you're on a Bungee network, you must enable "bungeecord: true" to make sure the game knows it can still connect to Mojang's servers to download skins).
* There are no errors ANYWHERE in your current log file (<code>logs/latest.log</code>). Any errors, even if seemingly unrelated, must be fixed!
* There are no errors ANYWHERE in your current log file (<code>logs/latest.log</code>). Any errors, even if seemingly unrelated, must be fixed!
* You are not being rate limited by Mojang. This can occur if you've loaded too many skins recently (from player head skull items, or from the npc skin command). This can be cured by waiting a while without loading more skins in, to allow Mojang to drop the rate limit.
* You are not being rate limited by Mojang. This can occur if you've loaded too many skins recently (from player head skull items, or from the npc skin command). This can be cured by waiting a while without loading more skins in, to allow Mojang to drop the rate limit.
* Mojang's servers are online. Check that the [https://status.mojang.com/check Mojang Status Page] is showing greens. If skins usually work but suddenly don't for a while, it might just be the official servers are down.


If you have confirmed you meet all of these requirements, but are still having trouble, feel free to post an issue to https://github.com/CitizensDev/Citizens2/issues with as much information as possible (At the very least, pastebin your current log file and Citizens saves.yml file)
If you have confirmed you meet all of these requirements, but are still having trouble, feel free to post an issue to [https://github.com/CitizensDev/Citizens2/issues GitHub] or ask on [https://discord.gg/Q6pZGSR Discord] with as much information as possible (At the very least, pastebin your current log file and Citizens saves.yml file)


Please '''DO NOT''' lie about any of these when requesting help. They are not to "catch you" or anything like that: these are listed because these requirements '''WILL''' cause issues if not met, and if you say you meet them but don't actually, you'll just be wasting everyone's time (including your own!)
Please '''DO NOT''' lie about any of these when requesting help. They are not to "catch you" or anything like that: these are listed because these requirements '''WILL''' cause issues if not met, and if you say you meet them but don't actually, you'll just be wasting everyone's time (including your own!).


== Helpful Tools ==
== Technical Info ==


There's a [https://www.spigotmc.org/resources/denizen.21039/ Denizen] script available to automatically load skins onto an NPC from any valid skin image URL (even just from imgur / any other direct-link image host). Get that script [https://forum.denizenscript.com/viewtopic.php?f=13&t=133 here].
If you're interested in how the skin system works internally (texture/signature system), you can view an explanation of the skin-blob system [https://one.denizenscript.com/denizen/lngs/player%20entity%20skins here on the Denizen documentation site].


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Revision as of 00:53, 11 March 2021

NPC Skins

Custom NPC skins are something that many server admins have asked for ever since Citizens was first released. In recent Minecraft versions it has become possible to control an NPC's skin via the new player packet system. By default an NPC will have the default Steve or Alex skin. You can set an NPC's skin by using the /npc skin [NAME] command. For example, /npc skin mcmonkey4eva

What's the best way to set a custom skin?

If you want to set a custom skin (one that isn't already on a player), use /npc skin --url [image]. The "[image]" part must be filled with a valid public image direct link. "public" means it's on a web host (you can just use Discord or imgur or whatever else) and "direct" means it's a link that ends with ".png" containing the raw image (not a link to an album or similar. Imgur by default gives you an album link, and you have to right click -> copy image URL).

For example: /npc skin --url https://gamepedia.cursecdn.com/minecraft_gamepedia/3/37/Steve_skin.png

Note that the --url feature is internally backed by Mineskin, and in some cases it may be helpful to use their website directly.

If you want a slim model (aka "Alex model") (3-pixel wide arms instead of 4) from a URL, it might be helpful to directly upload the skin image to Mineskin and use the model choice option on the page.

Other Options

You can use /npc skin [NAME] -l (a lowercase L) to always use the latest skin for the player (updating if the player changes their skin). If this is not set, the current skin (at time of using the command) will be retained.

You can use /npc skin -t [uuid] [data] [signature] from the console (or any large-input command sender) to set a very specific full skin blob from Mojang. If you don't know exactly what that is, just don't use it. It's a developer tool.

Note that some sites like https://mineskin.org/ let you generate values for the -t option.

Mirroring A Player's Current Skin

If you want every player to see their own current skin applied to the NPC, install Denizen and then use the command /npc mirrorskin. You can also have the name mirrored via /npc mirrorname.

For API Users

If you use the Java Citizens API, you can control skins on NPCs via npc.getOrAddTrait(SkinTrait.class) and calling a method like setSkinName. Refer to the SkinTrait JavaDoc for more information.

Note: you can't (and shouldn't) set from image or URL directly via Java API. Instead, upload your image to Mineskin and save the texture+signature data (store them in a string or a config file), and set that with setSkinPersistent(uniqueId, signature, texture).

Common Issues

Many issues can cause the skin system to fail. If you are experiencing issues, please ensure the following:

  • You are running a fully up to date Spigot server acquired from https://www.spigotmc.org/wiki/buildtools/ running a supported recent version of Minecraft. (Paper also generally works). You can use /version to check the version of your server.
  • You are running the latest dev version of Citizens2 from http://ci.citizensnpcs.co/job/Citizens2/ Please verify the specific build number (NOT the file version name) You can use /version citizens to check this build number.
  • You have a dedicated server (not a shared hosting service!)
  • You own your server's IP entirely (no other ports on the server are used by other minecraft servers! (Unless they're your own servers as well.))
  • You are running your server in ONLINE MODE (offline mode servers won't work!) (note that if you're on a Bungee network, you must enable "bungeecord: true" to make sure the game knows it can still connect to Mojang's servers to download skins).
  • There are no errors ANYWHERE in your current log file (logs/latest.log). Any errors, even if seemingly unrelated, must be fixed!
  • You are not being rate limited by Mojang. This can occur if you've loaded too many skins recently (from player head skull items, or from the npc skin command). This can be cured by waiting a while without loading more skins in, to allow Mojang to drop the rate limit.
  • Mojang's servers are online. Check that the Mojang Status Page is showing greens. If skins usually work but suddenly don't for a while, it might just be the official servers are down.

If you have confirmed you meet all of these requirements, but are still having trouble, feel free to post an issue to GitHub or ask on Discord with as much information as possible (At the very least, pastebin your current log file and Citizens saves.yml file)

Please DO NOT lie about any of these when requesting help. They are not to "catch you" or anything like that: these are listed because these requirements WILL cause issues if not met, and if you say you meet them but don't actually, you'll just be wasting everyone's time (including your own!).

Technical Info

If you're interested in how the skin system works internally (texture/signature system), you can view an explanation of the skin-blob system here on the Denizen documentation site.