Three Steps to Eliminate Lag of Camera Movement

In the project of my HiWi job, the lag of camera translation and rotation is highly noticeable even if I move it slowly. It delayed more than 3 frames visually. Here are 4 places need to be check if the same problem happened to you.

1. Don’t get the transformation from AActor::GetActorLocatino() and APlayerController::GetControlRotation(). Instead, get location and rotation from APlayerCameraManager::GetCameraCachePOV().Location/Rotation.
2. Change the tick group, which the getter of transformation is called from, to Post Update Work instead of During Physics
3. Set CVar r.OneFrameThreadLag to 0. You can do this in the BeginPlay event.

More information:

1. ETickingGroup
2. Low Latency Frame Syncing