# GLTF Appearing dark

**URL:** <https://community.cesium.com/t/gltf-appearing-dark/19293>\
**Category:** CesiumJS\
**Created:** [June 28, 2022, 12:13am UTC](https://community.cesium.com/t/gltf-appearing-dark/19293 "2022-06-28T00:13:17Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![kaikai](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/kaikai/32/8861_2.png) [@kaikai](https://community.cesium.com/u/kaikai)\
**Post date:** [June 28, 2022, 12:13am UTC](https://community.cesium.com/t/gltf-appearing-dark/19293/1 "2022-06-28T00:13:17Z")

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Hello,

I downloaded a gltf and imported it into cesium. It is laying directly on the ocean and our ocean floor is very dark as we are using blue marble imagery. Here is a link to the gltf.

https://sketchfab.com/models/17be09c31c6047e4a5969b68c29eba03/embed?

The gltf appears brightly colored when you view in sketchfab but appears very dark when imported into cesium  
We are using an older version of cesium as well (1.68)

Will any properties of ModelGraphics help me out with lighting? I have shadows disabled and the lighting in the viewer turned off. Will a cesium update solve this problem?

Thanks, Kai

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<div class="post-metadata">

**Author:** ![kaikai](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/kaikai/32/8861_2.png) [@kaikai](https://community.cesium.com/u/kaikai)\
**Post date:** [June 28, 2022, 6:35pm UTC](https://community.cesium.com/t/gltf-appearing-dark/19293/2 "2022-06-28T18:35:33Z")

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I wanted to add an update. I made the upgrade to version 1.94 but unfortunately the darkness still occurs

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<div class="post-metadata">

**Author:** ![sanjeetsuhag](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/sanjeetsuhag/32/1992_2.png) [@sanjeetsuhag](https://community.cesium.com/u/sanjeetsuhag)\
**Post date:** [June 29, 2022, 2:13pm UTC](https://community.cesium.com/t/gltf-appearing-dark/19293/3 "2022-06-29T14:13:33Z")

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Hi @kaikai

I would recommend tweaking the [`lightColor`](https://cesium.com/learn/cesiumjs/ref-doc/ModelGraphics.html?classFilter=modelgr#lightColor) and [`imageBasedLightingFactor`](https://cesium.com/learn/cesiumjs/ref-doc/ModelGraphics.html?classFilter=modelgr#imageBasedLightingFactor) properties to add lighting to your model.