# Strange Mesh Behaviour after going through TurboSmooth Subdivision Surface

**URL:** <https://forums.unrealengine.com/t/strange-mesh-behaviour-after-going-through-turbosmooth-subdivision-surface/387149>\
**Category:** World Creation\
**Tags:** importing-model, unreal-engine, 3DS-Max, Physics, question\
**Created:** [March 7, 2017, 12:36am UTC](https://forums.unrealengine.com/t/strange-mesh-behaviour-after-going-through-turbosmooth-subdivision-surface/387149 "2017-03-07T00:36:19Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Hnomer](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Hnomer](https://forums.unrealengine.com/u/Hnomer)\
**Post date:** [March 7, 2017, 12:36am UTC](https://forums.unrealengine.com/t/strange-mesh-behaviour-after-going-through-turbosmooth-subdivision-surface/387149/1 "2017-03-07T00:36:19Z")

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Hello.  
I am having a problem with weird mesh appearance when interacted by physics.  
This problem took place only after I processed my mesh through 3ds Max, and the only change I made there is I applied the TurboSmooth Subdivision Surface Modifier.  
So here is a screenshot of physics working on my mesh **before** TurboSmooth:

 ![128887-screenshot00003.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/3/3/1/33144c9290864d008750c5d0ec0a5ba8e698d269.png)

And here is one **after** TurboSmooth:  
(don’t pay attention to the shadow)

 ![128889-screenshot00001.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/6/5/3/65379216468a376fdc02bba889fe3c1ffce8c8a0.png)

I am totally noob about 3ds Max and about whole 3D modeling thingie, so please make the response in a manner of step by step instruction, if you could.

Thanks.

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<div class="post-metadata">

**Author:** ![Hnomer](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Hnomer](https://forums.unrealengine.com/u/Hnomer)\
**Post date:** [March 8, 2017, 12:15am UTC](https://forums.unrealengine.com/t/strange-mesh-behaviour-after-going-through-turbosmooth-subdivision-surface/387149/2 "2017-03-08T00:15:30Z")

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The problem got solved.  
Found this tutorial, which I paid not much attention to before:

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