---
title: "MTFillExtrusionLayer.opacityConst | Mobile sdk | Mobile sdk android | Android"
description: "opacityConst"
---

# MTFillExtrusionLayer.opacityConst

fun [opacityConst](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.map.style.layer.fillextrusion/-m-t-fill-extrusion-layer/opacity-const/)(value: [Double](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-double/index.html)): [MTFillExtrusionLayer](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.map.style.layer.fillextrusion/-m-t-fill-extrusion-layer/)