If the vision or combat penalty for poor lighting is between -1 and -4 for most people, your penalty is the worse of double the usual penalty or -3. If the usual penalty is -5 or worse, you function as though you were completely blind. If you have Acute Vision, it only applies in situations with no darkness penalty.
Make a self-control roll each morning upon awakening. If you fail, you suffered nightmares; this costs you 1 FP that you can only recover through sleep. On a roll of 17 or 18, you are left shaking, and are at -1 to all skill and Perception rolls for the entire day.
