After rotating the camera on z-axis and then calling the OrbitControls.update(), camera is reset to initial position.if I don’t call OrbitControls.update(), then after using mouse zoom or pan, camera again resets its rotation. How this can be solved
When using OrbitControls, the transformation of the camera is managed by the controls. It’s not valid to modify it differently since it will interfere with the controls logic.
The best approach for such a use case is a custom enhancement based on OrbitControls.
Try changing OrbitControls target instead
https://threejs.org/docs/#examples/en/controls/OrbitControls.target.