[abenedik]

I think you should set the FillBehavior to Stop.

daDistance.FillBehavior = System.Windows.Media.Animation.FillBehavior.Stop;

By default it is set to HoldEnd that prevents any other changes.

If I animate a scene camera's distance property it causes the mouse wheel to no longer function.

DoubleAnimation daDistance = new DoubleAnimation();
daDistance.From = sceneCamera.Distance;
daDistance.To = ZoomDistance;
daDistance.Duration = new System.Windows.Duration(TimeSpan.FromSeconds(2.0))

sceneCamera.BeginAnimation(Ab3d.Cameras.SceneCamera.DistanceProperty, daDistance, HandoffBehavior.Compose);

I have a MouseCameraController tied to the same viewport. After the animation is over I can no longer use the mouse wheel to zoom in and out, yet the rotate still works.

Any ideas?