# Smooth control over time

**URL:** <https://forums.unrealengine.com/t/smooth-control-over-time/475248>\
**Category:** Rendering\
**Tags:** time, smooth, unreal-engine, nodes, Shaders, question\
**Created:** [December 1, 2020, 12:15am UTC](https://forums.unrealengine.com/t/smooth-control-over-time/475248 "2020-12-01T00:15:01Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![ADIAN](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/adian/32/1194609_2.png) [@ADIAN](https://forums.unrealengine.com/u/ADIAN)\
**Post date:** [December 1, 2020, 12:15am UTC](https://forums.unrealengine.com/t/smooth-control-over-time/475248/1 "2020-12-01T00:15:01Z")

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Hi, i’m making wind for trees, and i wanna have control over wind speed, but when i’m changing the value whole tree is “jittering”…

![323518-screenshot-1.jpg](https://d3kjluh73b9h9o.cloudfront.net/original/4X/7/5/f/75fbb8e66d123b630501cbfc722bec123e53b851.jpeg)

I think this is happening because when the time node is multiplied, then whole integer inside changes, how do i control time smoothly?

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**Author:** ![Chumble](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Chumble](https://forums.unrealengine.com/u/Chumble)\
**Post date:** [February 1, 2023, 5:37pm UTC](https://forums.unrealengine.com/t/smooth-control-over-time/475248/2 "2023-02-01T17:37:45Z")

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I know this is old but I found this post when I was looking for a solution to this and was disappointed to see no response. This is a problem with changing the WindSpeed input in SimpleGrassWind - it will jitter the vertices. Don’t think there’s any way around it, unfortunately. Fortunately, you can kinda get a similar effect by modifying the WindIntensity. There’s a good video on setting this up (for grass and trees) here: [Simple Global Wind in UE4 (One weird trick! Everyone hates him!) - YouTube](https://www.youtube.com/watch?v=27Gr2RRhtNM)

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<div class="post-metadata">

**Author:** ![ADIAN](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/adian/32/1194609_2.png) [@ADIAN](https://forums.unrealengine.com/u/ADIAN)\
**Post date:** [May 8, 2023, 4:02am UTC](https://forums.unrealengine.com/t/smooth-control-over-time/475248/3 "2023-05-08T04:02:41Z")

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Yes, i have solved it like this.