Some other details of undead turning need clarification. The range of this effect is a 40' semicircular arc in front of the caster. The act of turning takes one segment. Creatures do not need to look at the cleric, but they do need to be in sight of the cleric. A cleric can maintain control indefinitely, as above, by periodically reasserting control; however, there is an absolute maximum of 10 dice of undead per level of the cleric. Note that this total includes any undead animated via spells of any kind.