<!--
{
  "availability" : [
    "iOS: 13.0.0 -",
    "iPadOS: 13.0.0 -",
    "macCatalyst: 13.0.0 -",
    "macOS: 10.15.0 -",
    "tvOS: 26.0.0 -",
    "visionOS: -"
  ],
  "documentType" : "symbol",
  "framework" : "RealityKit",
  "identifier" : "/documentation/RealityKit/PhysicsMaterialResource",
  "metadataVersion" : "0.1.0",
  "role" : "Class",
  "symbol" : {
    "kind" : "Class",
    "modules" : [
      "RealityKit"
    ],
    "preciseIdentifier" : "s:17RealityFoundation23PhysicsMaterialResourceC"
  },
  "title" : "PhysicsMaterialResource"
}
-->

# PhysicsMaterialResource

Material properties, like friction, of a physically simulated object.

```
@MainActor @preconcurrency class PhysicsMaterialResource
```

## Topics

### Using the default material resource

[`static let `default`: PhysicsMaterialResource`](/documentation/RealityKit/PhysicsMaterialResource/default)

A default material resource.

### Creating a custom material resource

[`static func generate(friction: Float, restitution: Float) -> PhysicsMaterialResource`](/documentation/RealityKit/PhysicsMaterialResource/generate(friction:restitution:))

Generates a new material with the given characteristics.

[`static func generate(staticFriction: Float, dynamicFriction: Float, restitution: Float) -> PhysicsMaterialResource`](/documentation/RealityKit/PhysicsMaterialResource/generate(staticFriction:dynamicFriction:restitution:))

Creates a new material with the specified static friction, dynamic friction, and restitution.

## Relationships

### Conforms To

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

[`Sendable`](/documentation/Swift/Sendable)

[`Resource`](/documentation/RealityKit/Resource)

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)