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

> For AI agents: a documentation index is available at [/llms.txt](https://docs-qmgv.pages.dev/llms.txt). Markdown versions of all pages are available by appending .md to any URL.

# baseExpr

fun [baseExpr](https://docs-qmgv.pages.dev/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-qmgv.pages.dev/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.map.style.dsl/-property-value/)): [MTFillExtrusionLayer](https://docs-qmgv.pages.dev/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.map.style.layer.fillextrusion/-m-t-fill-extrusion-layer/)