It is because that the RateScale is multiplied twice.

First at UAnimSequenceBase::TickAssetPlayer :

{{ const float PlayRate = Instance.PlayRateMultiplier * this->RateScale;}}


Second at UAnimSequence::AdvanceMarkerPhaseAsLeader :

float CurrentMoveDelta = MoveDelta * RateScale;


It seems like we should remove the Second multiply.


Steps to Reproduce

1.Set a AnimationSequence's RateScale to 2.

2.Add a SyncMarker on the Animation Notifications Track.

3.In the AnimGraph , use this Animation and set a SyncGroup to it.

4.In the preview window, the animation's play rate will be doubled.

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ComponentOLD - Anim
Affects Versions4.19.2
Target Fix4.26
Fix Commit4325552
CreatedMay 11, 2018
ResolvedAug 11, 2020
UpdatedApr 28, 2021
View Jira Issue