Illumination systems and methods for illuminating one or more remote locations andor objects from a single light source are disclosed. The system includes at least one working path associated with each of the protection groups, and at least one working maintenance entity group monitoring the status of each of the working paths. The candidate cell is recursively subdividing into subdivided cells of the adaptively sampled distance field while determining and storing corresponding distance values of the subdivided cells in the bounded distance tree until a termination condition is reached.