# ReverbMeshResource A high-level representation of a collection of vertices and edges that define a shape used for simulating reverb. ``` final class ReverbMeshResource ``` ## Overview Use a `ReverbMeshResource` to describe the acoustic geometry of your scene. Create one from geometric primitives, custom vertex data, or an existing [`MeshResource`](/documentation/RealityKit/MeshResource): ```swift // From a geometric primitive: let room = ReverbMeshResource.shoebox(size: [4, 3, 5]) // From custom vertex data: let mesh = try ReverbMeshResource( positions: myPositions, triangleIndices: myIndices, materials: perFaceMaterialIndices ) // From an existing mesh resource: let mesh = try ReverbMeshResource(from: myVisualMesh) ``` Pair a reverb mesh with [`Audio.Material`](/documentation/RealityKit/Audio/Material) values and set a [`ReverbComponent`](/documentation/RealityKit/ReverbComponent) on an entity to activate simulated reverb: ```swift let reverb: Reverb = .simulated(mesh: room, materials: [.concrete, .carpet]) entity.components.set(ReverbComponent(reverb: reverb)) ``` > Note: Reverb meshes perform best with fewer than 1000 polygons. ## Topics ### Creating standard room shapes [`static func shoebox(size: SIMD3) -> Self`](/documentation/RealityKit/ReverbMeshResource/shoebox(size:)) Creates a box mesh with the vertices positioned such that the bottom surface is at y=0, with faces oriented inward. [`static func box(size: SIMD3) -> Self`](/documentation/RealityKit/ReverbMeshResource/box(size:)) Creates a box mesh with vertices positioned such that the origin is at the center, with faces oriented outward. [`static func plane(width: Float, depth: Float) -> Self`](/documentation/RealityKit/ReverbMeshResource/plane(width:depth:)) Creates a new rectangle reverb mesh with the specified dimensions in the entity’s xz-plane. ### Creating a custom mesh [`convenience init(positions: [SIMD3], triangleIndices: [UInt32], materials: [UInt32]) throws`](/documentation/RealityKit/ReverbMeshResource/init(positions:triangleIndices:materials:)) Creates a reverb mesh resource from a list of positions, triangle indices, and material indices. ### Initializers [`convenience(from:)`](/documentation/RealityKit/ReverbMeshResource/init(from:)) Creates a reverb mesh resource from a mesh resource. ## Relationships ### Conforms To [`Resource`](/documentation/RealityKit/Resource) [`SendableMetatype`](/documentation/Swift/SendableMetatype) [`Hashable`](/documentation/Swift/Hashable) [`Equatable`](/documentation/Swift/Equatable) [`Sendable`](/documentation/Swift/Sendable) --- Copyright © 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)