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Message: <blockquote data-quote="kigmatzomat" data-source="post: 9666977" data-attributes="member: 9254">I'm a 3e type by nature who would love nothing more than a table of +2s & -3s but I will try to follow 5e design philosophy and come up with useful rules that are in keeping with what exists.(Edit:fixed some grammar that was unclear on illusionist vs perceiver)5e2024 illusion mechanics from the srd spells are <ul> <li data-xf-list-type="ul">Physical interaction with the image reveals it to be an illusion, because things passed through the illusion</li> <li data-xf-list-type="ul">a creature who takes a Study action to examine the illusion... can determine that it is an illusion with a successful Intelligence (Investigation) check against the spell save DC (8+pb+stat bonus)</li> </ul>We'll start with illusions of things where "pass through it" is an instant deal breaker.<ul> <li data-xf-list-type="ul">un-animated illusions of 'solid" things are recognized as illusions automatically if a hand, weapon, tool, etc is seen to pass through it.  A passive perception test may be needed to notice this if the character is not engaging with the illusion (e.g. does the wizard notice the Fighter's sword go through the illusory goblins head while said wizard is fighting a wolf?)</li> <li data-xf-list-type="ul">animated illusions of "solid" things that are made to "dodge" require characters to make attack rolls to exceed the spell save DC to "hit" them. This reflects the attacker outmaneuvering the caster and realizing they are fighting an illusion</li> <li data-xf-list-type="ul">a creature who takes a Study action to examine the illusion can determine that it is an illusion with a successful Intelligence (Investigation) check against the spell save DC</li> </ul>Next, illusions of gaseous/incorporeal things<ul> <li data-xf-list-type="ul">un-animated illusions of gaseous/incorporeal things are NOT recognized as illusions automatically if a hand, weapon, tool, etc just passes through it because that's what happens.</li> <li data-xf-list-type="ul">animated illusions of "incorporeal" things that are made to "dodge" require characters trying to "hit" the illusion to make attack rolls with disadvantage against the spell save DC. This reflects the attacker outmaneuvering the caster having the illusion dodge and doing well enough to believe they should have got some kind of reaction or sensation ("why didn't I feel anything when I stuck my whole hand inside this shadow's head?")</li> <li data-xf-list-type="ul">a creature who takes a Study action to examine the illusion can determine that it is an illusion with a successful Intelligence (Investigation) check against the spell save DC</li> </ul>Modifiers<ul> <li data-xf-list-type="ul">illusions missing key elements (a Silent Image iron golem being utterly silent while walking around on a stone floor, a fire elemental without heat) give the attacker/investigator advantage.</li> <li data-xf-list-type="ul">being told it is an illusion grants advantage</li> </ul></blockquote>

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