Change block state when walking over it

[full dragon]

I have a block that I'm trying to make change its state when a player touches it.
The block is spikes, and I'd like them to retract.
Is there any way to do this? What all do I need to do?
Do I need to make a seperate model for the retracted variant? Or can I just animate the spikes into the ground somehow?
I'm using block wizard and vsc if it helps

[silver sequoia]

Use onStepOn custom component to change permutation.

[full dragon]

What would that look like in practice?

I'm still newer to coding so I don't really know how to apply that

[cyan flax]

HCF Removal and Custom Components

The Holiday Creator Features experimental toggle has been removed. Along with it includes JSON block and item events. This functionality has been replaced with custom components.

Please take a look at the following links to learn more about custom components:

Bedrock Wiki

• Block Events
• Block Events Migration to Custom Components
• Item Events
• Item Events Migration to Custom Components

MS Docs

• Introduction To Custom Components
• Building With Custom Components

Jun 6, 2026, 12:02 AM

[full dragon]

Also do I need to make a new model?

[silver sequoia]

You can use bone visibility to hide the spikes.

[full dragon]

thank you

[full dragon]

I have one more question, sorry, what is the component for bone visibility?

I'm struggling to find it in the articles

[silver sequoia]

Its part of the geometry

[full dragon]

Will it return once I've stepped off the block?

Or do I need to code that in as well

Would that be onStepOff?

or would I need to check state every few ticks

[silver sequoia]

Yes.

[full dragon]

thank you

[full dragon]

i tried to apply all the states but there's an issue

my block doesnt have collisions since it's meant to be walked through

so onStepOn and onStepOff don't work

[junior sphinx]

You could give that part a collision since it's only 1px height, it won't affect pathfinding that much and it can trigger the onStepOn

"minecraft:collision_box": {
    "origin": [-8, 0, -8],
    "size": [16, 1, 16]
}

Like this !

[full dragon]

thank you

[silver sequoia]

Incorrect actually. It needs to be y of 4

[junior sphinx]

Spikes are being considered?

[silver sequoia]

Wdym?

The collision needs to be a min height of 4 to trigger on step

[junior sphinx]

I think it would be weird to be 4 pixels if you're mean to step over them

[junior sphinx]

O

I see

👓

I wasn't aware of that limitation, is there any reason why is limited to 4 pixels?

[full dragon]

hmm

is there any way to do what i want though

i cant use onStepOn or onStepOff