# Cesium not showing all the geometry

**URL:** <https://community.cesium.com/t/cesium-not-showing-all-the-geometry/39374>\
**Category:** Cesium ion\
**Created:** [March 18, 2025, 8:37pm UTC](https://community.cesium.com/t/cesium-not-showing-all-the-geometry/39374 "2025-03-18T20:37:12Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![pedro\_choza](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/pedro_choza/32/28173_2.png) [@pedro\_choza](https://community.cesium.com/u/pedro_choza)\
**Post date:** [March 18, 2025, 8:37pm UTC](https://community.cesium.com/t/cesium-not-showing-all-the-geometry/39374/1 "2025-03-18T20:37:12Z")

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Hi. When i add data to cesium ion (one .ifc file), Cesium ion doesnt show all the geometry:

 ![CESIUMIFC](https://global.discourse-cdn.com/cesium/original/3X/7/4/749081cfbaeb397fc753433c27b903bc7b770577.jpeg)

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**Author:** ![pedro\_choza](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/pedro_choza/32/28173_2.png) [@pedro\_choza](https://community.cesium.com/u/pedro_choza)\
**Post date:** [March 19, 2025, 2:01am UTC](https://community.cesium.com/t/cesium-not-showing-all-the-geometry/39374/2 "2025-03-19T02:01:27Z")

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It seems to be that that surfaces only are shown in one only side. Each surface only is shown at one point of view (right-below, left-top view)

 ![CESIUMIFC2](https://global.discourse-cdn.com/cesium/original/3X/e/4/e4ae41edf5e14faa8384e5710de7124f0b2ee154.jpeg)

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**Author:** ![janine](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/janine/32/5135_2.png) [@janine](https://community.cesium.com/u/janine)\
**Post date:** [March 20, 2025, 3:08pm UTC](https://community.cesium.com/t/cesium-not-showing-all-the-geometry/39374/6 "2025-03-20T15:08:13Z")

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Hi, @pedro_choza,

I believe this is the same message as the one that was sent to our support inbox, but I’ll copy my answer here for transparency.

The view with missing geometry is from Cesium for Unreal, which currently does not handle double-sided materials on its own. This is a known limitation that we are tracking in a Github issue [here](https://github.com/CesiumGS/cesium-unreal/issues/31).

You can check if the **Double Sided** setting is enabled on the **CesiumDefaultTilesetMaterial**. If it’s not already enabled, try seeing if that works. Otherwise, we may have to make some changes in the plugin to support double-sided materials.

Thanks!

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<div class="post-metadata">

**Author:** ![pedro\_choza](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/pedro_choza/32/28173_2.png) [@pedro\_choza](https://community.cesium.com/u/pedro_choza)\
**Post date:** [March 20, 2025, 11:14pm UTC](https://community.cesium.com/t/cesium-not-showing-all-the-geometry/39374/8 "2025-03-20T23:14:15Z")

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Hi Janine, sorry because Im “noob”. Where can I find the CesiumDefaultTilesetMaterial setting? I have looking for this in cesium ion and in the details of the asset inside unreal engine and I dont find the setting. Thanks!

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**Author:** ![janine](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/janine/32/5135_2.png) [@janine](https://community.cesium.com/u/janine)\
**Post date:** [March 21, 2025, 8:43pm UTC](https://community.cesium.com/t/cesium-not-showing-all-the-geometry/39374/9 "2025-03-21T20:43:56Z")

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Hi @pedro_choza,

I apologize for the incorrect instructions. You actually will want to modify the material called `MI_CesiumThreeOverlaysAndClipping`. If you select it in the Content Browser and open the material editor, then you should be able to see a property labeled “Two Sided” that you can toggle.

 ![image](https://global.discourse-cdn.com/cesium/original/3X/e/f/ef1926ae6bf826a4651c8b7e4dd710a1ccf2ed7e.png)