# \[BUG ?\] UMG animated brush material parameter has the wrong default value

**URL:** <https://forums.unrealengine.com/t/bug-umg-animated-brush-material-parameter-has-the-wrong-default-value/580211>\
**Category:** C++\
**Tags:** unreal-engine, Engine-Source-Code, Blueprint, UE4-27, question, UMG\
**Created:** [June 12, 2022, 5:30pm UTC](https://forums.unrealengine.com/t/bug-umg-animated-brush-material-parameter-has-the-wrong-default-value/580211 "2022-06-12T17:30:34Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Roy\_Wierer.Seda145](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/roy_wierer.seda145/32/906551_2.png) [@Roy\_Wierer.Seda145](https://forums.unrealengine.com/u/Roy_Wierer.Seda145)\
**Post date:** [June 12, 2022, 5:30pm UTC](https://forums.unrealengine.com/t/bug-umg-animated-brush-material-parameter-has-the-wrong-default-value/580211/1 "2022-06-12T17:30:34Z")

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Problem inside the UMG editor (anywhere):

A simple UMG animation controls a scalar parameter on a brush material:

 ![afbeelding](https://d3kjluh73b9h9o.cloudfront.net/original/4X/b/1/1/b11e3ea817c6c600ded4e251d6c0560a119b3373.png)

In the material , the parameter default is set to 0, which reflects its default state.

 ![afbeelding](https://d3kjluh73b9h9o.cloudfront.net/original/4X/a/1/9/a19945ea7e157ee59747128beff7efade1a839e7.png)

As you can see on the brush, which is generated in this form by the editor, It assumes 1 before the animation plays:  
 ![afbeelding](https://d3kjluh73b9h9o.cloudfront.net/original/4X/3/b/9/3b9966d92286b88e7e49e34737c296f66a9e38a4.png)

 ![afbeelding](https://d3kjluh73b9h9o.cloudfront.net/original/4X/8/7/b/87bec145eb0a1d1a39be1e3b49bd1632ec135f68.png)

Resulting in all my editor previews looking wrong.

Note that this even happens with infinite ranges… The editor just doesn’t update it before any frame plays.

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<div class="post-metadata">

**Author:** ![Roy\_Wierer.Seda145](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/roy_wierer.seda145/32/906551_2.png) [@Roy\_Wierer.Seda145](https://forums.unrealengine.com/u/Roy_Wierer.Seda145)\
**Post date:** [June 13, 2022, 1:25am UTC](https://forums.unrealengine.com/t/bug-umg-animated-brush-material-parameter-has-the-wrong-default-value/580211/2 "2022-06-13T01:25:40Z")

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bump

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<div class="post-metadata">

**Author:** ![Roy\_Wierer.Seda145](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/roy_wierer.seda145/32/906551_2.png) [@Roy\_Wierer.Seda145](https://forums.unrealengine.com/u/Roy_Wierer.Seda145)\
**Post date:** [June 18, 2022, 9:01pm UTC](https://forums.unrealengine.com/t/bug-umg-animated-brush-material-parameter-has-the-wrong-default-value/580211/3 "2022-06-18T21:01:20Z")

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bump

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<div class="post-metadata">

**Author:** ![Roy\_Wierer.Seda145](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/roy_wierer.seda145/32/906551_2.png) [@Roy\_Wierer.Seda145](https://forums.unrealengine.com/u/Roy_Wierer.Seda145)\
**Post date:** [June 20, 2022, 5:41am UTC](https://forums.unrealengine.com/t/bug-umg-animated-brush-material-parameter-has-the-wrong-default-value/580211/4 "2022-06-20T05:41:31Z")

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🚀

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<div class="post-metadata">

**Author:** ![Roy\_Wierer.Seda145](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/roy_wierer.seda145/32/906551_2.png) [@Roy\_Wierer.Seda145](https://forums.unrealengine.com/u/Roy_Wierer.Seda145)\
**Post date:** [June 21, 2022, 1:45am UTC](https://forums.unrealengine.com/t/bug-umg-animated-brush-material-parameter-has-the-wrong-default-value/580211/5 "2022-06-21T01:45:56Z")

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🔄