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My nether portal is a stone throw away from a lava lake. I've been using a crab load of buckets to keep my furnaces running for building materials.

I'm trying to cut the work down and not run around all the time. I'm trying to figure out if it's possible to have a redstone device that I can just drop buckets in and it'll gather the lava for me.

I've been doing some tests but I keep getting buckets spat into the lava pool and I'm not desiring to lose more iron. Just seeing if it's possible. Or worthwhile.

  • It's probably possible in MCBE, because you can push dispensers with pistons there, but not in MCJava. – Fabian Röling May 30 at 10:06
  • An option to an automatic lava farm might be an offline tree farm, Etho did one a couple of years ago that you might take inspriation from: youtube.com/watch?v=YdPKU1lZpJs. Episode 440 and 441 is also about the farm. – Polygorial May 30 at 12:29
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If you are getting buckets spat into the lava pool, it is either because you are dispensing buckets using a dropper or because you are dispensing them into flowing lava instead of source blocks.

Unlike water, lava doesn't create source blocks. This means you can't create infinite lava sources like you can with water, and unfortunately you cannot automate the full process.

You can, however, semi-automate this process by creating a system where you use one bucket to transport the lava between the lava lake and the machine, and the machine will fill each bucket from an input hopper. You can check out many tutorials online to help you with this, or see if you can find a bug online that can help you create an infinite lava source.

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  • good answer. But there is a small mistake in the second paragraph, it should be ...can't create infinite lava sources like you can with water... where the first instance of the word water should be changed to lava. – Polygorial May 30 at 12:23
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The only option to automatically fill a bucket with lava is using a dispenser, from lava source right in front of it. The dispenser can't be moved (in front of next lava source) in vanilla Java Edition, and the lava source can only be moved using buckets (potentially with (immovable) dispensers). So, in short, "no". You can't truly automate the process of gathering lava.

What you can do though is to automate transport. A minecart line, automatic loaders/unloaders, sending empty buckets back, even means of sending the carts through a portal to the overworld and keep the overworld part loaded. You'd only need to fill the buckets and put them in a chest of the loading station right next to the lava lake.

On the other hand, the Carpet Mod provides movable tile entities. That means you could build a flying machine that harvests a lake of lava through use of a moving dispenser.

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