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<blockquote data-quote="DreamChaser" data-source="post: 3647378" data-attributes="member: 1190">this is because line of effect is a relative not absolute concept. The line of effect for a fireball cast on the prime material plane is different from the line of effect for a fireball cast on the ethereal plane (the things the affect one, will not necessarily the other).In the case of blindsense, a blindsense based upon sound (such as that possessed by bats) would find LoE blocked by the silence spell. But for creatures that do not have a specific type of blindsense, silence would not block line of effect.Keeping with a sensory concept, a creature with tremor sense standing upon a free floating island of stone with a 5' gap between it and other solid land would not be able to detect the movement of a creature across the gap because the empty space would serve as a barrier to the &quot;effect&quot; in question.Detect magic could not sense a magical item on the far side of a AMF (unless, by some chance the Detect effect was able to encompass the whole of the AMF with the magical item on the far side and continuous areas of effect between both the caster and the item).Trying to apply one absolute measure to a relative effect is useless; what must be done is approach each effect with a measure of what could block its line of effect (based upon the idea of a barrier blocking line of effect).A sound effect is blocked by silenceA magic effect is blocked by AMFa spread effect is blocked by a solid barrieretc.DC</blockquote>

[QUOTE="DreamChaser, post: 3647378, member: 1190"] this is because line of effect is a relative not absolute concept. The line of effect for a fireball cast on the prime material plane is different from the line of effect for a fireball cast on the ethereal plane (the things the affect one, will not necessarily the other). In the case of blindsense, a blindsense based upon sound (such as that possessed by bats) would find LoE blocked by the silence spell. But for creatures that do not have a specific type of blindsense, silence would not block line of effect. Keeping with a sensory concept, a creature with tremor sense standing upon a free floating island of stone with a 5' gap between it and other solid land would not be able to detect the movement of a creature across the gap because the empty space would serve as a barrier to the "effect" in question. Detect magic could not sense a magical item on the far side of a AMF (unless, by some chance the Detect effect was able to encompass the whole of the AMF with the magical item on the far side and continuous areas of effect between both the caster and the item). Trying to apply one absolute measure to a relative effect is useless; what must be done is approach each effect with a measure of what could block its line of effect (based upon the idea of a barrier blocking line of effect). A sound effect is blocked by silence A magic effect is blocked by AMF a spread effect is blocked by a solid barrier etc. DC [/QUOTE]

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