# reactiveMaskTexture A reactive-mask texture input for this scaler to evaluate. ``` var reactiveMaskTexture: (any MTLTexture)? { get set } ``` ## Discussion This texture helps guide the denoiser when objects move quickly in a scene with inaccurate motion information, such as when they involve alpha blending. In these situations, you can get better results by guiding MetalFX whether to favor the current frame on a per-pixel basis with a reactive mask texture. When providing this texture, you are responsible for ensuring each pixel is in the range `[0.0, 1.0]`, where a value: - Equal to `0.0` tells MetalFX to follow its normal behavior for the corresponding pixel - Equal to `1.0` tells MetalFX to ignore temporal history for the corresponding pixel - In the range `(0.0, 1.0)` proportionally blends the effect for the corresponding pixel --- 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)