FamilyJewels - Anti XRay
What is FamilyJewels?
FamilyJewels is a server-side plugin designed to be provide a certain level of protectection against X-Ray cheaters. Like other anti xray plugins, FamilyJewels modifies the block information before it is sent to the client. This technique doesn't save any modified block data to your world.
Unlike other anti-xray plugins FamilyJewels strives to provide an anticheat experience that does not impact a legitimate player in any way. Someone who is playing legitimately should never know that FamilyJewels is installed. Since we strive to have no impact on legitimate players, you may find that FamilyJewels is not as effective as other antixray plugins and some ores may still be visible in caves. We feel this is a fair trade off, but you are welcome to compare for yourself:

Any block that is not directly exposed to air will be sent to the client as smooth stone. When a player begins digging, any nearby blocks are updated and sent to the client which will cause them to appear before any blocks are broken. It is possible that some extremely laggy players will see smooth stone turn into ore immediately after digging, but this is rare.
Before you Install
- This plugin hooks the NetServerHandler and may not be compatible with other plugins that do the same (eg Spout).
- This plugin hooks directly into CraftBukkit to perform certain features not available to the API, as a result, it may break between Minecraft patches.
- This is not a pure Bukkit plugin and this will only work on pure CraftBukkit servers.
- While we have been running this plugin for several months on our server. there is always the possibility of world corruption or otherwise weird behavior. Use this plugin on a test server before deploying it to a production environment.
Issues and Feedback
Please report all issues and feedback with FamilyJewels at http://www.github.com/Minecarts/FamilyJewels/issues
While we personally have been running this plugin for many months, we cannot guarantee that it won't break your world. Please make backups.
Source Code
You can view and contribute to FamilyJewels at our github page: http://www.github.com/Minecarts/FamilyJewels/
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Posted Jul 20, 2012For some reason water flow is messed up if the water is flowing from a confined space. I believe this was due to a change in your last update. Is there any way this can be fixed?
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Posted Jul 17, 2012dont think the plugin is working right ask my friend to use his nodus client to test the anti xray and he said he was able to see the ores S:
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Posted Jul 10, 2012@Luwiego
That's essentially what it does. Only the ores are filtered.
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Posted Jul 10, 2012@x_clucky
I doubt it.
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Posted Jul 8, 2012Does this work with Tekkit's and SpoutMaterials' blocks?
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Posted Jul 4, 2012Hello, i was thinking, all the anti xray plugins hide the whole chucnk, wouldnt it be better if you would hide only the ores, and is there a way that all the ores would appear like stone?
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Posted Jul 3, 2012@Negociator95
What other plugins are you using?
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Posted Jun 24, 2012@Negociator95
The only difference you should notice is less ores are visible.
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Posted Jun 23, 2012This is not working for me on Bukkit 1.2.5 R4. Any suggestions?
EDIT: I'm testing the latest version right now. Unless I need to set up permissions... everyone can still xray.
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Posted Jun 22, 2012@gabesarch
FamilyJewels takes a simpler approach, so I can only assume it uses less resources, but your mileage may vary. If you run your own tests, please report back with your findings!
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Posted Jun 22, 2012So this plugin reduces CPU usage and RAM usage compared to something like orebfuscator?
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Posted Jun 18, 2012@domingo15
Correct, as described in plugin summary above.
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Posted Jun 18, 2012I did some observations and i notice that ores that are expose to "AIR" will not be hidden.
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Posted Jun 17, 2012Is this compatible with nolagg?
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Posted Jun 13, 2012@domingo15
Yes, it's possible and we see it happen occasionally. Lighting level isn't checked.
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Posted Jun 13, 2012@levisn1
Does the default config work? i.e. no config. What other plugins do you have installed?
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Posted Jun 13, 2012@levisn1
:o so the plugin doesn't hide ores?
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Posted Jun 13, 2012@megabytes
is it possible that even though the ore or block is expose to air it still can be seen as a stone?
same thing goes for ores that are expose to light.
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Posted Jun 13, 2012cfg doesn't work..if i try to hide only certain ores...when i start the server x-rayers can see all ores.. -.- i tried two time but nothin..and yaml sintax was right...any solutions?
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Posted Jun 13, 2012@megabytes
Thanks for the quick response going to test it out on my test server :P