---
title: "baseExpr | Mobile sdk | Mobile sdk android | Android"
description: "baseExpr"
---

# baseExpr

fun [baseExpr](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/base-expr/)(expr: [PropertyValue](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.map.style.dsl/-property-value/)): [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/)