Xray Command Block
Create an ore detector with a stick, compass, and diamond ore, then use it to highlight ores through walls. Like a vanilla XRay.
Screenshots:
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
How to install:
- To add any one-command creation to your world, first give yourself a command block with /give @p minecraft:command_block.
- Next, place it and paste the following command inside it.
You should try another interesting X-Ray contents here: Minecraft X-Ray
Xray Command
For Minecraft 1.9.4 and 1.10.2