CesiumGS / CesiumGS/cesium

specularEnvironmentMaps not working with 3D Tiles

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category - 3d tiles category - lighting type - bug
Dominant language
JavaScript
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Description

Related community forum thread: https://community.cesium.com/t/how-to-use-specularenvironmentmaps-in-3dtiles/12001

When trying to set the specularEngironmentMaps for 3D tileset, the user is running into the following error:
![image](https://user-images.githubusercontent.com/38567338/104966032-f8019680-59ad-11eb-84fc-ea605ac4587a.png)

The example is using a tileset from Cesium SampleData folder.

Sandcastle reproducing error: [link](https://sandcastle.cesium.com/index.html#c=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)

This Sancastle is created based on the [Image Based Lighting Sandcastle](https://sandcastle.cesium.com/index.html?src=Image-Based%20Lighting.html) in the documentation.

Contributor guide

Open the contributing guide

Research direction

Start with the linked Sandcastle reproduction and compare it with the Image Based Lighting Sandcastle from the documentation. Read the 3D Tiles and image-based-lighting entry points involved in the reproduction, then verify the fix by loading the SampleData tileset with specularEnvironmentMaps without the reported error.

Written by the indexing model from the issue text.

Assessment

Tech stack
javascript
Domain
computer-graphics
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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