# Polylines disappear in 2D

**URL:** <https://community.cesium.com/t/polylines-disappear-in-2d/1225>\
**Category:** CesiumJS\
**Created:** [May 21, 2014, 1:05pm UTC](https://community.cesium.com/t/polylines-disappear-in-2d/1225 "2014-05-21T13:05:09Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Matthew\_Gwynne](https://avatars.discourse-cdn.com/v4/letter/m/53a042/32.png) [@Matthew\_Gwynne](https://community.cesium.com/u/Matthew_Gwynne)\
**Post date:** [May 21, 2014, 1:05pm UTC](https://community.cesium.com/t/polylines-disappear-in-2d/1225/1 "2014-05-21T13:05:09Z")

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Hi,

Has anyone else experienced the disappearance of polylines in 2D mode? For example, switching to 2D in

> **[Cesium Sandcastle](https://sandcastle.cesium.com/index.html?src=CZML.html&label=Showcases)**
>
> The Cesium Sandcastle provides an interactive environment for testing Cesium code.

results in the Satellite orbit trails disappearing completely. Switching to 2.5D or 3D modes brings them back.

Thanks in advance,

Matthew Gwynne

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**Author:** ![patrick](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/patrick/32/2045_2.png) [@patrick](https://community.cesium.com/u/patrick)\
**Post date:** [May 22, 2014, 12:49am UTC](https://community.cesium.com/t/polylines-disappear-in-2d/1225/2 "2014-05-22T00:49:08Z")

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I can’t reproduce this. Are there any messages in the console? What video card do you have? Are the drivers up to date? Is the browser up to date? Have you tried Chrome and Firefox?

Thanks,

Patrick

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**Author:** ![Tamy](https://avatars.discourse-cdn.com/v4/letter/t/bbe5ce/32.png) [@Tamy](https://community.cesium.com/u/Tamy)\
**Post date:** [May 22, 2014, 12:27pm UTC](https://community.cesium.com/t/polylines-disappear-in-2d/1225/3 "2014-05-22T12:27:52Z")

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Hi Matthew,

I had this problem before. I had to change my NVIDIA graphic card.

[https://groups.google.com/forum/#!topic/cesium-dev/XFtvzARL03k](https://groups.google.com/forum/#!topic/cesium-dev/XFtvzARL03k)

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**Author:** ![Matthew\_Gwynne](https://avatars.discourse-cdn.com/v4/letter/m/53a042/32.png) [@Matthew\_Gwynne](https://community.cesium.com/u/Matthew_Gwynne)\
**Post date:** [May 22, 2014, 9:40pm UTC](https://community.cesium.com/t/polylines-disappear-in-2d/1225/4 "2014-05-22T21:40:28Z")

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Updating my graphics drivers (Intel HD 3000) fixed the issue. Thanks!