Unity Issue Tracker - SpeedTree does not move when using WindZone while having Vulkan or OpenGLES3 as an active Graphics API

Duplicate

Duplicate in 6000.5.X

Votes

1

Found in

6000.0.67f1

6000.3.7f1

6000.4.0b7

6000.5.0a6

Issue ID

UUM-134143

Regression

Yes

SpeedTree does not move when using WindZone while having Vulkan or OpenGLES3 as an active Graphics API

Environment Effects

Feb 10, 2026

Reproduction steps:
1. Open the attached project “ReproProject”
2. Open the scene “SampleScene“
3. Make sure Vulkan or OpenGLES3 is set as an active Graphics API (the option can be checked in Edit -> Project Settings -> Player -> Other Settings -> Graphics API for Windows
4. Enter into the Play Mode
5. Observe the result

Actual result: Speed tree does not react to the wind effect produced by WindZone
Expected result: Speed tree reacts to the wind effect produced by WindZone

Reproducible in: 2023.3.0b8, 6000.0.67f1, 6000.3.7f1, 6000.4.0b7, 6000.5.0a6
Not reproducible in: 2023.1.0a1, 2023.3.0b7

Reproducible on: Windows 11
Not reproducible on: No other environments tested

Notes:
- Does not reproduce with DirectX11 or DirectX12
- Reproduces in a Standalone Player for Windows

This is a duplicate of issue #UUM-87614

SpeedTree does not move when using WindZone

Resolution Note:

Thank you for reporting a bug to Unity.

We have reviewed the issue and found it is a duplicate of an existing bug already logged in our system. To keep things organized and ensure the issue is properly prioritized, we have linked your report to the original case.

We will now close this report as a duplicate, but the original bug remains open and under review. Your input has been noted and helps us better understand the impact of the issue. If anything changes regarding its severity or impact, please let us know.

Thank you for helping us improve Unity!
Resolution Note (6000.5.X):

Thank you for reporting a bug to Unity.

We have reviewed the issue and found it is a duplicate of an existing bug already logged in our system. To keep things organized and ensure the issue is properly prioritized, we have linked your report to the original case.

We will now close this report as a duplicate, but the original bug remains open and under review. Your input has been noted and helps us better understand the impact of the issue. If anything changes regarding its severity or impact, please let us know.

Thank you for helping us improve Unity!

Comments (1)

JoMoschos

Feb 18, 2026 17:53

Thank you for marking this issue as fixed and linking it as a duplicate.

However, I can confirm that the problem is still reproducible in Unity 6000.3.xx (LTS).

SpeedTree trees do not respond to WindZone when Vulkan or OpenGLES3 is the active Graphics API. The wind animation only works when using DX-based rendering backends.

According to the Issue Tracker, this was fixed in 6000.0.36f1 and related 6000.0/6000.1 streams. Since 6000.3 LTS is a later branch, the fix should already be included — but the issue persists.

Could you please clarify:

• Was the fix actually merged into the 6000.3 LTS branch?
• If so, could this be a regression?

This is affecting both Editor (non-DX backend) and player builds, so confirmation would be greatly appreciated.

Thank you.

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