# How to extrude a billboard/entity that has a height for the position?

**URL:** <https://community.cesium.com/t/how-to-extrude-a-billboard-entity-that-has-a-height-for-the-position/3583>\
**Category:** CesiumJS\
**Created:** [January 18, 2016, 5:54am UTC](https://community.cesium.com/t/how-to-extrude-a-billboard-entity-that-has-a-height-for-the-position/3583 "2016-01-18T05:54:36Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Sai\_Asuka](https://avatars.discourse-cdn.com/v4/letter/s/b5e925/32.png) [@Sai\_Asuka](https://community.cesium.com/u/Sai_Asuka)\
**Post date:** [January 18, 2016, 5:54am UTC](https://community.cesium.com/t/how-to-extrude-a-billboard-entity-that-has-a-height-for-the-position/3583/1 "2016-01-18T05:54:36Z")

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I have an entity with a position (fromDegrees lat,lng,height) and a billboard.  
I want to be able to show a line that goes from the billboard to the ground (similar to how polylines if you set the option, show a line going from each point to the ground. What is the simplest way to do this or is this possible?

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**Author:** ![hannah](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/hannah/32/4509_2.png) [@hannah](https://community.cesium.com/u/hannah)\
**Post date:** [January 18, 2016, 3:17pm UTC](https://community.cesium.com/t/how-to-extrude-a-billboard-entity-that-has-a-height-for-the-position/3583/2 "2016-01-18T15:17:02Z")

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Hello,

You can accomplish this using a polyline with the option followSurface: false.

Here is a code example:

var viewer = new Cesium.Viewer(‘cesiumContainer’);

viewer.entities.add({  
polyline : {  
positions : Cesium.Cartesian3.fromDegreesArrayHeights([-75, 43, 0,  
-75, 43, 100]),  
width : 3,  
followSurface : false,  
material : Cesium.Color.WHITE  
}  
});

viewer.zoomTo(viewer.entities);

``

Best,

Hannah