How To Make Impossible Slabs In Vanilla Minecraft!

What if I told you that you could make a slab out of anything in Minecraft? If you didn’t believe it, these are actually real — and you can see this because when you go up to them, they’re basically two different slabs on top of each other, which is technically illegal in Minecraft! Now, I’m actually joking about the illegal part — today I’m going to be showing you how to actually do this. It’s really cool and I’m going to be pushing Minecraft to its limits to see what we can actually do with this.

If you’d prefer to watch the video version of this, you can check it out here: How To Make Impossible Slabs In Vanilla Minecraft

Getting Started with Command Blocks

To kick things off, I grabbed a command block, and my goal was simple — try and make slabs out of literally anything. The plan was to use falling sand blocks, which are technically an entity and not a block, to create these impossible-looking slabs. I placed down the command block to keep the command saved and then got to work figuring out how to make this happen.

Summoning a Falling Sand Block

I quickly put together a command that would summon a falling sand block. As you can see in the video, once I ran it, the block stayed there for a surprisingly cool amount of time. However, it’s basically just a temporary block — you can walk right through it, and it doesn’t really do anything on its own. To fix the despawning issue, I added a time value of negative one, which essentially means that when the block is summoned, it takes that much time to despawn, keeping it visible and in place.

Placing the Slab — The Tricky Part

Once I had the falling block spawning in nicely, I noticed something interesting — you can’t actually place a slab on it because it technically isn’t a real block, and it behaves quite glitchy. When the block was on the floor, I could place a slab there, and it actually looked like half a block — which is exactly what we were going for! The problem though was that it wasn’t sitting on a grid, so it didn’t look quite right.

Fixing the Offset

The solution to the grid issue was to simply offset the block’s position. My first attempt was way off — I had done my math completely wrong and had to go back and adjust the numbers. After some trial and error, I landed on an offset of 0.5, since that’s half of a block. I also realised I had forgotten to add a key part of the command — the alignment for the X, Y, and Z coordinates. Once I added that, the block spawned in aligned to the grid, and it was starting to look really promising.

The Double Entity Trick

At this stage, I was starting to see some really interesting patterns forming. I noticed that there were actually two entities in the same spot, which gave me an idea — what if I spawned in three entities, with one slightly offset and the other not? I updated the command to summon a slab-like block with one offset value, and then did the opposite offset for a second one. And honestly — it worked! We ended up with something that genuinely looks like a slab made from a non-slab block, and it looks incredible.

What Does This Mean for Minecraft?

There are videos out there showing two slabs being pushed together with pistons, and this experiment kind of proves that something like that could potentially be real — though I still don’t think pushing actual blocks with pistons would achieve quite the same result. These are technically “fake” blocks in that they’re entities rather than true placed blocks, but they look absolutely convincing in-game. It’s one of those things that makes you appreciate just how much is possible when you start exploring the edges of what Minecraft can do.

Final Thoughts

I honestly can’t believe we pulled this off — it was a fun challenge and a great reminder of how much creativity is hiding inside Minecraft’s systems. Thank you so much for reading, and if you enjoyed this, don’t forget to subscribe and leave a like on the video! I’d love to keep bringing you content like this. See you in the next one!