How To Make Minecraft Impossible Slabs Is In Vanilla Minecraft!?!?

What if I told you that you could make a slab out of anything in Minecraft? If you don’t believe me, these are actually real. You can see this because, when I walk up to them, they’re basically two different slabs on top of each other—which is illegal in Minecraft.

Okay, I’m joking. Today I’m going to show you how to actually do this. It’s really cool, and we’re going to push Minecraft to its limits to see what we can do.

Setting Up the Test

Let’s start. I’m going to grab a command block. My goal today is to make slabs out of literally anything, so we’re going to try using falling sand blocks—which are technically entities, not blocks—to make slab-like shapes.

I’m placing down a command block so I can keep the command ready and reuse it easily.

Summoning a Falling Sand Block

First, I’m going to try spawning a random falling sand block. I quickly made a command that summons a falling sand block. As you can see, when I run it, a “block” appears and stays there for a short time.

But this is basically a temporary block. It doesn’t really exist like a normal block: I can walk through it, and it doesn’t behave like a real placed block.

That wasn’t supposed to happen—so I used a quick fix by adding a negative time value. This means that when I summon the block, it will take that long before it despawns.

Now when I run the command, it spawns a visible block again.

Trying to Place a Slab Into It

You’ll notice I can’t actually place a slab “into” this because it technically isn’t there, and it’s pretty glitchy. But if I try placing a slab when it’s on the floor, I can place a slab there.

The problem is that it isn’t aligned to the grid. It looks like it’s half a block—which is what we’re aiming for—but it doesn’t look clean because it doesn’t sit properly on the block grid.

Fixing the Alignment

This is where the solution comes in: offsetting the summoned block.

I tried offsetting it by one, but that was way too much. At this point I realized I completely did my math wrong, and I just needed to change the numbers.

I thought maybe using 0.5 would work, since that’s half a block.

The Missing Piece in the Command

It turns out I was doing something wrong in the command. Everything was working, except I forgot to add one small part. I needed to use an alignment option and specify the axes: X, Y, and Z.

Once I added that, it aligned the coordinates of the block when I spawned it. When I ran it again, it did look offset—but the block positioning was starting to look really interesting.

It looked awesome… but I still couldn’t place the slab into it.

Finding the Right Offset

I tried moving over to a different spot and ran the command again. Something weird happened: patterns started appearing on the block.

So I tried offsetting the block again, by something like 0.1, and tested it in another position.

And then—there it was.

We got one side working, and it looked really, really cool.

Creating the “Impossible Slab” Effect

The problem now was that, with one side offset, we couldn’t easily add the other part in the same space to make it look like one clean slab. If we spawned multiple blocks around it, it wouldn’t be a single “block” effect anymore.

But I noticed something: there were actually two entities in the same spot. That made me wonder—could we spawn three? Maybe one offset slightly, and one not, and see if that creates the full slab illusion.

So I fixed up the command again and tried it.

And… oh my gosh. We did it.

Look at that. Even though there’s a tiny bump showing—and it kind of looks like a slab combined with another block—it still looks like an impossible slab effect.

Are Those Viral “Double Slab” Videos Real?

This makes me think those videos showing two slabs pushed together with pistons might be real—but I still don’t think they are.

What we’re doing here is different. These are like “fake” blocks… but they’re not exactly fake either. It’s confusing, but it doesn’t matter—because the result is really cool.

Wrap-Up

Thanks so much for watching. If you want to see more videos like this, don’t forget to subscribe and leave a like. If you want to check out how I made a circle or how I made a sphere, go click the cards that pop up.

Thanks again for watching, and I can’t wait to see you in the next video. See you.