# How to reduce unexpected ripple on 3d model?

**URL:** <https://community.cesium.com/t/how-to-reduce-unexpected-ripple-on-3d-model/16016>\
**Category:** CesiumJS\
**Created:** [November 5, 2021, 5:44am UTC](https://community.cesium.com/t/how-to-reduce-unexpected-ripple-on-3d-model/16016 "2021-11-05T05:44:27Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![shmike](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/shmike/32/3472_2.png) [@shmike](https://community.cesium.com/u/shmike)\
**Post date:** [November 5, 2021, 5:44am UTC](https://community.cesium.com/t/how-to-reduce-unexpected-ripple-on-3d-model/16016/1 "2021-11-05T05:44:27Z")

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Hi all,  
When I loaded 3d module with CesiumJS in Chrome, I met an unexpected ripple issue, like showed in the image below. Do you know the root cause, or how to fix it? Thanks in advance

 ![issue.PNG](https://global.discourse-cdn.com/cesium/original/3X/d/3/d35052b9ab9774eefca80c97e146bcd18071cf11.jpeg)

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**Author:** ![sam.rothstein](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/sam.rothstein/32/6584_2.png) [@sam.rothstein](https://community.cesium.com/u/sam.rothstein)\
**Post date:** [November 8, 2021, 6:22pm UTC](https://community.cesium.com/t/how-to-reduce-unexpected-ripple-on-3d-model/16016/2 "2021-11-08T18:22:00Z")

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@shmike

Welcome to the community! 😀 🚀

Does the ripple effect only occur when viewing this 3D model in CesiumJS? If so, I suspect that you are noticing a [Moiré pattern](https://en.wikipedia.org/wiki/Moir%C3%A9_pattern). Does this seem plausible to you? If so, I recommend that you check out out the following community forum thread:

[https://community.cesium.com/t/moire-pattern-when-turning-on-soft-shadows/16011/3](https://community.cesium.com/t/moire-pattern-when-turning-on-soft-shadows/16011/3)

@Bowen7 seems to be dealing with a similar issue. As I mentioned in his thread, I do not currently know of a quick fix to this issue. However, modifying the shadow and lighting settings may yield preliminary results.

-Sam

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<div class="post-metadata">

**Author:** ![shmike](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/shmike/32/3472_2.png) [@shmike](https://community.cesium.com/u/shmike)\
**Post date:** [November 11, 2021, 6:38am UTC](https://community.cesium.com/t/how-to-reduce-unexpected-ripple-on-3d-model/16016/3 "2021-11-11T06:38:57Z")

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Thanks Sam for your reply.  
As you said, my issue is similar with @Bowen7’s issue (#16011). It may be a common issue. Could you or @Bowen7 or others look into it?