# pixelCast(from:to:) Performs a ray cast against all the geometry in the scene for a ray between two end points. ``` @MainActor @preconcurrency func pixelCast(from startPosition: SIMD3, to endPosition: SIMD3) async throws -> PixelCastHit? ``` ## Parameters `startPosition` The start position of the ray relative to the scene. `endPosition` The end position of the ray relative to the scene. ## Return Value A `PixelCastHit`. The hit indicates where the ray, starting at `startPosition` and ending at `endPosition`, hit a particular entity in the scene. ## Discussion The method ignores entities that lack a [`ModelComponent`](/documentation/RealityKit/ModelComponent) with a valid mesh. --- 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)