Reply to thread

Message: <blockquote data-quote="Ashrym" data-source="post: 9444314" data-attributes="member: 6750235">This <a href="https://www.dndbeyond.com/spells/2136-hallucinatory-terrain" target="_blank">link from DDB</a> shows your premise is faulty.That does not claim the spell automatically fails.  That text claims it's likely to fail if the character enters the area EXCEPT when the difference isn't obvious by touch.  The illusion from outside of the area of effect isn't obvious by touch because the character in question is not touching it.  The illusion does not need to differ by touch.  The investigation check takes a deliberate action.A group traveling down the trail that sees a some bushy grassland off to the side sees some bushy grassland off to the side even it it's really a steep ravine.  An illusion that covers a 150 ft cube for 24 hours without concentration and no saving throw has it's uses.Mirage Arcane does the same thing except the range is sight with an area of a square mile for 10 days without concentration and no save, but also adds that tactile component by which Hallucinatory Terrain is flawed.  Mirage Arcane removes the option to disbelieve with a check and adds structures.   Truesight lets the individual know it's an illusion but the other components remains so the individual is still forced to interact with the illusion.These aren't worthless spells just because you don't see their worth.</blockquote>