UE5 Chaos Destructible Objects

What You Will Build

• A clean separation between destroyable and destructible objects
• A Chaos Geometry Collection created from a static mesh
• A fractured cylinder using the Fracture tools
• A destructible Blueprint using a Geometry Collection component
• Weapon logic that applies radial impulse and strain
• A destructible wall that demonstrates scale-dependent Chaos tuning

Destroyable vs Destructible Objects

Before building anything, the architecture needs to be corrected.

A destroyable object is removed by gameplay logic. It usually has health, receives damage, and calls Destroy Actor when health reaches zero.

A destructible object is different. It breaks through physics simulation. It fractures through Chaos, strain, collision, and impulse. It is not destroyed by a health component.

Mixing these two ideas is sloppy architecture. Keep them separate.

Step 1: Rename the Previous Health-Based Actor

If you followed the previous health tutorial, rename the old health-driven object from:

BP_BaseDestructibleObject

to:

BP_BaseDestroyableObject

That name is more accurate because it represents an object destroyed by gameplay logic, not Chaos physics.

Step 2: Create a New Destructible Actor Blueprint

Create a new Actor Blueprint and name it:

BP_BaseDestructibleActor

This Blueprint will represent objects broken by Chaos Geometry Collections.

Also create a folder named:

Geometries

Use this folder to store static meshes, fractured meshes, and Geometry Collections. Organization matters more as your project grows.

Step 3: Create a Static Mesh in Modeling Mode

In the viewport, switch from Selection Mode to:

Modeling Mode

In the Create section, choose Cylinder.

Use values like:

• Radius: 25
• Height: 60

Set New Asset Location to:

Current Folder

Make sure your Geometries folder is selected, then click Accept.

Rename the generated mesh to something clean like:

MyCylinder

Step 4: Convert the Static Mesh into a Geometry Collection

Switch to:

Fracture Mode

Select the cylinder and click:

New

Create a Geometry Collection named:

GC_MyCylinder

Store it inside the Geometries folder.

This Geometry Collection is what Chaos uses for fracture simulation.

Step 5: Fracture the Geometry Collection

In the Fracture tools, choose:

Uniform

Uniform fracture breaks the mesh into evenly distributed Voronoi pieces.

Fewer pieces create larger chunks. More pieces create a more explosive broken look. There is no universal perfect setting. It depends on the object and gameplay need.

When the preview looks acceptable, click:

Fracture

The object still looks whole, but internally it is now split into multiple fragments.

Step 6: Configure Chaos Damage Threshold

Select the Geometry Collection and open the Details panel.

Under Chaos Physics, disable:

Show Bone Colors

Then expand Damage Threshold and use test values such as:

• Index 0: 50
• Index 1: 20
• Index 2: 10

These low values make the object easier to break while you validate the system.

Step 7: Enable Damage from Collision

Make sure:

Enable Damage from Collision

is turned on.

Without this option, collision impacts will not generate damage or strain, so the object may refuse to fracture even when everything else looks correct.

Step 8: Add the Geometry Collection to the Destructible Blueprint

Open:

BP_BaseDestructibleActor

Add a:

Geometry Collection

component and make it the root.

In the Details panel, assign your Geometry Collection asset to:

Rest Collection

Compile and save.

This Blueprint wrapper is optional for pure fracture objects, but it is useful if you want future gameplay logic attached to the destructible object.

Step 9: Apply Radial Impulse from Weapon Hits

Open:

BP_ThirdPersonCharacter

Find your existing fire logic after the line trace, decal spawning, and physics impulse logic.

From the trace Hit Actor, call:

Get Component by Class

Set the component class to:

Geometry Collection Component

Then check it with:

Is Valid

If valid, call:

Apply Radial Impulse

Step 10: Configure Apply Radial Impulse

For the radial impulse node:

• Origin: Impact Point
• Radius: 50
• Strength: 100
• Apply Strain: Enabled
• Strain: 100
• Falloff: Constant

The most important setting here is Apply Strain. Without strain, the object may receive force but not fracture properly.

Newer Chaos Workflow vs Older Workflow

In older Unreal Engine versions, Chaos workflows often used Apply Damage followed by Apply External Strain.

In newer versions, Apply Damage for Geometry Collections is deprecated, so Apply Radial Impulse with strain is the cleaner option.

Use the modern node if your engine version supports it.

Step 11: Adjust Collision to Avoid Physics Instability

Open the Geometry Collection collision settings and set Pawn interaction to:

Ignore

This prevents the player capsule from pushing fractured pieces in strange or explosive ways.

Chaos pieces interacting badly with the player capsule can create ugly physics instability. Fix it early.

Step 12: Test the Fractured Cylinder

Place the Geometry Collection or Blueprint version into the level.

Press Play, pick up the weapon, and shoot it.

If configured correctly, the cylinder should fracture into pieces through Chaos physics, not health logic.

Step 13: Create a Destructible Wall

To demonstrate scale differences, create a larger wall mesh in Modeling Mode using Box.

Example dimensions:

• Width: 100
• Depth: 400
• Height: 400

Store it in the Geometries folder, convert it into a Geometry Collection, and name it:

GC_Wall

Use Uniform fracture with around 10 Voronoi sites for testing.

Step 14: Tune Destruction for Larger Objects

A large wall will not break the same way as a small cylinder. This is where Chaos becomes very clear: destruction is scale dependent.

If the wall does not break, increase the radial impulse values. Example tuning:

• Radius: 1000
• Strength: 10000
• Strain: 10000
• Max Value: 100

These values are not universal. They are test values for a larger object.

Why Chaos Destruction Is Scale Dependent

Small props and large walls do not respond to the same force values. Object size, mass distribution, fracture count, clustering, thresholds, and collision all affect the final result.

This is why you cannot copy one impulse value into every destructible object and expect perfect results. You have to test and tune.

Common Mistakes to Avoid

• Confusing destroyable health-based objects with Chaos destructible objects
• Forgetting to create a Geometry Collection
• Not lowering Damage Threshold for testing
• Forgetting to enable Damage from Collision
• Applying impulse without enabling Apply Strain
• Using tiny impulse values on large structures
• Leaving Pawn collision enabled and causing unstable physics interactions

Conclusion

In this tutorial, you created real destructible objects in Unreal Engine 5 using Chaos Geometry Collections. You built a static mesh, converted it into a fractured Geometry Collection, configured damage thresholds, enabled collision damage, applied radial impulse and strain from weapon hits, and tested both small props and large wall destruction.

The key lesson is simple: real destructible objects are driven by Chaos physics, not health values or fake destroy calls.

Watch the full tutorial on YouTube: How to Make Destructible Objects in Unreal Engine 5 Chaos Destruction

Subscribe for more Unreal Engine tutorials: Subscribe to Rambod on YouTube

Frequently Asked Questions

What is the difference between destroyable and destructible objects in Unreal Engine?

Destroyable objects are removed by gameplay logic, usually through health and Destroy Actor. Destructible objects fracture through Chaos physics, strain, and Geometry Collections.

Do Chaos destructible objects need a health system?

No. Chaos destruction can be driven directly by physics, radial impulse, strain, and collision-based damage.

Why is my Geometry Collection not breaking?

Common causes include high damage thresholds, Damage from Collision being disabled, Apply Strain not enabled, or impulse values being too weak for the object scale.

Why does a wall need stronger impulse than a small prop?

Because Chaos destruction is scale dependent. Larger objects often need larger radius, strength, and strain values to fracture properly.

Should I use a Blueprint wrapper for every Geometry Collection?

Not always. If the object only needs to fracture, placing the Geometry Collection directly can be enough. A Blueprint wrapper is useful when you need extra gameplay logic.

Why disable Pawn collision on fractured pieces?

It helps prevent unstable physics reactions between the player capsule and Chaos fragments during gameplay.