rangom(A set of continuous item identifiers to which the same clock vector applies. A range is represented by a starting point, an ending point, and a clock vector that applies to all IDs that are in between); rangom(A set of continuous item identifiers to which the same clock vector applies. A range is represented by a starting point, an ending point, and a clock vector that applies to all IDs that are in between); alcancem(The range of a light. Objects that are within the range will be lit by the light. Objects beyond the range of the light will not be lit by the light. Range properties only apply to the Spot Light and Point Light)
