In this scene I have 3 boxes. The camera is targeted on the central box (box1):
https://playground.babylonjs.com/#1A3M5C#139
When box1.position is updated in the scene.beforeRender method by incrementing the variable alpha, the box stays in the center of the screen as expected (commented lines).
But when alpha is changed with a slider (actual version of the playground), box1 is shaking around the center of the screen when the slider is used to change alpha…
How should I proceed to alter this behavior?