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Discuss Minecraft's Redstone systems, including automation, circuits, components, and technical gameplay. Share ideas and feedback on Redstone mechanics across Minecraft. Because Java Edition and Bedrock Edition use different Redstone systems, some behaviors will differ between versions. Please tag your posts with Java, Bedrock, or Both where applicable.

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(Java) Observers should detect map updates

Observers facing maps should detect when a map is updated. This would be cool because it would add a new way of wireless redstone to this update, along with sculk sensors. For example, you could be in a second base far away from your home base in spawn chunks, but want to activate a super smelter system or other contraption at your home base, so you place a block in a predetermined area while holding a map, and by the time you get back to your home base, your super smelter is finished. Overall, I think it would add an exciting new possibility for redstone engineers.

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    Registered User commented
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    I’m not sure this could work because I’m pretty sure maps in frames are entities.

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    Registered User commented
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    Maybe the observer could take a "snapshot" of the NBT color values of the map each redstone tick, and output a signal if the data doesn't match?