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Message: <blockquote data-quote="Kinematics" data-source="post: 7803204" data-attributes="member: 6932123">I wrote something up a few days ago, but lost it.  Forum post concealment wins!Anyway, I consider all of this to be describable as a combination of status effects.  Some status effects affect creatures, while others affect areas.  Status effects can be applied and removed by other actions.Summary – The ability of a creature to perceive (see, hear, etc) a target is determined by the most limiting factor out of: the creature's sense status, the target's perceivable status, the target's area status, and any interfering obscurement between the creature and the target.Tactical Rules – If a condition is met, cease further evaluations.<ul> <li data-xf-list-type="ul">If a creature cannot be detected (not seen/heard/felt/smelled/etc, directly or indirectly), an attacker cannot attack the creature.</li> <li data-xf-list-type="ul">If a creature cannot see its target, it has disadvantage on attacks against that target.</li> <li data-xf-list-type="ul">If a creature cannot be seen by the creature it is attacking, it has advantage on attacks against that target.</li> </ul>Creature Status EffectsCreature Sense Status Effects – These status effects describe whether a creature can use its senses. Other senses may apply as appropriate. (EG: Numb – cannot feel; Congested – cannot smell; etc.)<ul> <li data-xf-list-type="ul">Blind – Creature cannot see.</li> <li data-xf-list-type="ul">Deaf – Creature cannot hear.</li> </ul>Creature Perceivable Status Effects – These status effects affect how well a creature or object can be perceived.<ul> <li data-xf-list-type="ul">Invisible – Creature cannot be seen.</li> <li data-xf-list-type="ul">Silent – Creature cannot be heard.</li> <li data-xf-list-type="ul">Partially Concealed – A creature that is partially concealed may have partial (half or three-quarters) cover. The creature may have disadvantage to be seen.</li> <li data-xf-list-type="ul">Fully Concealed – A creature that is fully concealed may have full cover, and cannot be directly targeted. The creature cannot be seen.</li> <li data-xf-list-type="ul">Hidden – Creature cannot be detected.</li> </ul>Area Status EffectsArea Status Effects (Light)<ul> <li data-xf-list-type="ul">Lit – Creatures and objects in this area can be seen.</li> <li data-xf-list-type="ul">Dimly Lit – Creatures and objects in this area can be seen, but doing so is at disadvantage.</li> <li data-xf-list-type="ul">Dark – Creatures and objects in this area cannot be seen.</li> <li data-xf-list-type="ul">Total Darkness – Creatures and objects in this area cannot be seen, and there is no non-dark area within visual range.</li> <li data-xf-list-type="ul">Magical Darkness – The spell suppresses light within the affected area. Creatures within are blinded, and the area is considered heavily obscured with respect to light.</li> </ul>Unless specifically noted, lighting status does not interfere with seeing through or out of the area.Area Status Effects (Sound)<ul> <li data-xf-list-type="ul">Normal – Creatures and objects in this area can be heard.</li> <li data-xf-list-type="ul">Muffled – Creatures and objects in this area can be heard, but doing so is at disadvantage.</li> <li data-xf-list-type="ul">Silent – Creatures and objects in this area cannot be heard.</li> <li data-xf-list-type="ul">Magical Silence – The spell suppresses sound within the affected area. Creatures within are deafened, and the area is considered heavily obscured with respect to sound.</li> </ul>Unlike light, distance may affect the apparent area status.Area Status Effects (Obstruction)<ul> <li data-xf-list-type="ul">Unobscured – Creatures and objects in this area can be seen.</li> <li data-xf-list-type="ul">Lightly Obscured – Creatures and objects in this area can be seen, but doing so is at disadvantage.  A creature in this area has disadvantage in seeing other creatures or objects, unless the creature is at the edge of the area and viewing an unobscured area.</li> <li data-xf-list-type="ul">Heavily Obscured – Creatures and objects in this area cannot be seen.  Creatures in this area cannot see creatures or objects outside of their own occupied space.</li> <li data-xf-list-type="ul">Fully Obscured – Creatures and objects in this area cannot be detected.  Creatures in this area cannot see creatures or objects outside of the area.</li> </ul>Barring special circumstances, obscurement always interferes with seeing through or out of the specified area.NB: Obstruction may affect senses other than sight, but the descriptions are kept simple.</blockquote>

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