For those that are interested to remove the fadeout between transition simply change :
private void CreateInTransition()
// TODO: 1f is the transition time. Set to null if disabled, option for fade or black. Get transition overrides from step. Start and end transition.
_transition = new Transition(_camExposureJSON, 0f, _camExposureBackup, _transitionTimeJSON.val, true);
private void CreateOutTransition()
_transition = new Transition(_camExposureJSON, _camExposureBackup, 0f, _transitionTimeJSON.val, false);