# PerInstanceCustomData not working in HISM

**URL:** <https://forums.unrealengine.com/t/perinstancecustomdata-not-working-in-hism/465717>\
**Category:** Asset Creation\
**Tags:** Hierarchical-Instanced-Static-Mesh, hism, unreal-engine, Instanced-Mesh, question\
**Created:** [May 24, 2020, 10:29am UTC](https://forums.unrealengine.com/t/perinstancecustomdata-not-working-in-hism/465717 "2020-05-24T10:29:03Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Ali\_TeamRevived](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/ali_teamrevived/32/623450_2.png) [@Ali\_TeamRevived](https://forums.unrealengine.com/u/Ali_TeamRevived)\
**Post date:** [May 24, 2020, 10:29am UTC](https://forums.unrealengine.com/t/perinstancecustomdata-not-working-in-hism/465717/1 "2020-05-24T10:29:03Z")

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There’s a new feature in UE 4.25 which lets us send an array of custom data per instance to the material. However, it doesn’t work reliably in hierarchical instanced static mesh (it works perfectly in ISM). Does anybody know what’s the problem? Or is there a workaround for it? Or is it a work-in-progress to bring it also to HISM?

![302641-hism-perinstancecustomdata.gif](https://d3kjluh73b9h9o.cloudfront.net/original/4X/e/f/9/ef9120d40da64f9667a62d92b76d4f5ccacc5945.gif)

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**Author:** ![Everynone](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/everynone/32/1135017_2.png) [@Everynone](https://forums.unrealengine.com/u/Everynone)\
**Post date:** [July 28, 2020, 9:08am UTC](https://forums.unrealengine.com/t/perinstancecustomdata-not-working-in-hism/465717/2 "2020-07-28T09:08:56Z")

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Link to a what seems to be very related question:

> **[Hierarchical Instanced Static Mesh does not support Custom Data correctly](https://forums.unrealengine.com/questions/973535/hierarchical-instanced-static-mesh-does-not-suppor.html)**
>
> New to 4.25 was the ability to specify per instance custom float data. It appears to work great for Instanced mesh, but for Hierarchical Instanced Static Mesh the indices are not stable. As the camera moves around the custom data moves to different...

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**Author:** ![monodrobe](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@monodrobe](https://forums.unrealengine.com/u/monodrobe)\
**Post date:** [August 13, 2020, 1:33am UTC](https://forums.unrealengine.com/t/perinstancecustomdata-not-working-in-hism/465717/3 "2020-08-13T01:33:59Z")

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Im having issues with it as well, it seems to break down around 150 instances and is progressivly worse the more you add

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**Author:** ![Tefel](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/tefel/32/1194573_2.png) [@Tefel](https://forums.unrealengine.com/u/Tefel)\
**Post date:** [August 22, 2020, 10:10am UTC](https://forums.unrealengine.com/t/perinstancecustomdata-not-working-in-hism/465717/4 "2020-08-22T10:10:51Z")

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I saw it reported in 4.25 at least 5 times. [Unreal Engine Issues and Bug Tracker (UE-92865)](https://issues.unrealengine.com/issue/UE-92865) I also reported it in May.  
For now the only alternative is using ISM instead of HISM. I hope this can be resolved in the future, because I cannot imagine my life without LOD 🙂

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**Author:** ![asdzxcv](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@asdzxcv](https://forums.unrealengine.com/u/asdzxcv)\
**Post date:** [December 4, 2020, 3:18pm UTC](https://forums.unrealengine.com/t/perinstancecustomdata-not-working-in-hism/465717/5 "2020-12-04T15:18:45Z")

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is this resolved in 4.26 ?

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**Author:** ![Tefel](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/tefel/32/1194573_2.png) [@Tefel](https://forums.unrealengine.com/u/Tefel)\
**Post date:** [December 4, 2020, 4:50pm UTC](https://forums.unrealengine.com/t/perinstancecustomdata-not-working-in-hism/465717/6 "2020-12-04T16:50:45Z")

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Same question!