OreHider

This mod replaces all ores in chunk data packets sent to client to stone, so there are no ore on client, preventing it from being spotted by X-ray cheats. No client-side installation is required.

When you get near the ore block it will be showed to you as is by server. The minimal distance and check frequency can be configured.

Target and Replacer blocks can also be configured, you just need block modid, registry name and metadata. And you can use * for wildcard metadata in target entries.

Requires ASJCore 1.2.0.0 to run.