Potion of object detection - Revision history

Umbire the Phantom: move un magic mapping note now that object detection article is established

2025-10-24T09:20:14Z

move un magic mapping note now that object detection article is established

Umbire the Phantom: /* Variants */ pothole

2025-10-24T00:22:37Z

‎Variants: pothole

Umbire the Phantom: citations mostly

2025-10-21T11:57:57Z

citations mostly

Umbire the Phantom: /* Generation */ word choice

2025-10-20T12:09:50Z

‎Generation: word choice

Umbire the Phantom: copyedit, fix refs

2025-10-20T12:07:06Z

copyedit, fix refs

Umbire the Phantom: word choice

2025-07-08T07:51:57Z

word choice

Umbire the Phantom: variants, relevant history, etc.

2025-07-08T07:49:52Z

variants, relevant history, etc.

Umbire the Phantom: /* Strategy */ bit more tailoring

2025-07-07T23:51:54Z

‎Strategy: bit more tailoring

Umbire the Phantom: everything up to variants - so glad to have finally marked this off

2025-07-07T23:51:08Z

everything up to variants - so glad to have finally marked this off

Umbire the Phantom: get it together!!!!

2025-07-07T22:16:37Z

get it together!!!!

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 ==Description==
-A [[hero]] [[quaffing]] the potion will be shown all objects on the current level and [[exercise]] [[wisdom]] if at least one object is detected, with the exact effects dependent on the potion's [[beatitude]]:{{refsrc|src/potion.c|849|version=NetHack 3.6.7}}{{refsrc|src/potion.c|853|version=NetHack 3.6.7}}
+A [[hero]] [[quaffing]] the potion will [[Object detection|be shown all objects on the current level]] and [[exercise]] [[wisdom]] if at least one object is detected, with the exact effects dependent on the potion's [[beatitude]]:{{refsrc|src/potion.c|849|version=NetHack 3.6.7}}{{refsrc|src/potion.c|853|version=NetHack 3.6.7}}
 * An uncursed potion displays the current position of all objects on the level using a blank map, including [[buried]] and underwater objects{{refsrc|src/potion.c|851|version=NetHack 3.6.7|comment=calls <tt>object_detect()</tt> in detect.c}}{{refsrc|src/detect.c|582|version=NetHack 3.6.7|comment=<tt>object_detect()</tt> function}}&mdash;objects not known to the hero will be displayed as their object type, i.e. "a scroll", "a potion", "a bag", etc.
@@ Line 56: / Line 56: @@
 ===ZAPM===
 In [[ZAPM]], the equivalent to the potion of object detection from ''NetHack'' is the floppy disk of object detection.
 ===dNetHack===

@@ Line 65: / Line 65: @@
 Spa shops in [[Elshava]] can stock potions of object detection.
-[[Invoking]] the [[Marauder's Map]] detects objects identically to a potion of the same beatitude as the [[artifact]], then detects other artifacts on the level, mapping them over existing marked objects if necessary.
+[[Invoking]] [[The Marauder's Map (dNetHack)|The Marauder's Map]] detects objects identically to a potion of the same beatitude as the [[artifact]], then detects other artifacts on the level, mapping them over existing marked objects if necessary.
 ===SlashTHEM===

@@ Line 4: / Line 4: @@
   |cost=150
 }}
 A '''potion of object detection''' is a type of [[potion]] that appears in ''[[NetHack]]''.
@@ Line 23: / Line 22: @@
 * A blessed potion will display objects as an uncursed one does, but items that are not in a [[monster]]'s inventory are treated as though the hero handled them up close, and so will have their full object appearance shown (including identified ones where possible).{{refsrc|src/detect.c|589|version=NetHack 3.6.7}}{{refsrc|src/detect.c|619|version=NetHack 3.6.7}}{{refsrc|src/detect.c|630|version=NetHack 3.6.7}}{{refsrc|src/detect.c|641|version=NetHack 3.6.7}}{{refsrc|src/detect.c|655|version=NetHack 3.6.7}} The hero also learns the appearance of all items in their inventory if applicable.
-Stale object markings are always cleared when mapping the level from this effect. Floor items are mapped over buried items, items on the top of piles are mapped over the rest of the pile, and the first item in a monster's inventory is mapped over any items they are standing on.{{refsrc|src/detect.c|608|version=NetHack 3.6.7}}{{refsrc|src/detect.c|648|version=NetHack 3.6.7}}{{refsrc|src/detect.c|683|version=NetHack 3.6.7}}{{refsrc|src/detect.c|702|version=NetHack 3.6.7}}{{refsrc|src/detect.c|719|version=NetHack 3.6.7}}{{refsrc|src/detect.c|744|version=NetHack 3.6.7}} The hero can navigate the resulting screen from quaffing the potion by moving their cursor to highlight particular objects, and any other key that does not perform a navigation action will exit this screen{{refsrc|src/detect.c|679|version=NetHack 3.6.7}}{{refsrc|src/detect.c|762|version=NetHack 3.6.7|comment=temporary map navigation}}&mdash;the locations of those objects are recorded when returning to normal play. Monsters will not use this potion.
+Stale object markings are always cleared when mapping item locations from this effect.{{refsrc|src/detect.c|284|nethack=3.6.7|comment=<tt>clear_stale_map()</tt>}}{{refsrc|src/detect.c|666|nethack=3.6.7|comment=call from <tt>object_detect()</tt> if there were no stale markings to clear}} Floor items are mapped over buried items, items on the top of piles are mapped over the rest of the pile, and the first item in a monster's inventory is mapped over any items they are standing on.{{refsrc|src/detect.c|608|version=NetHack 3.6.7}}{{refsrc|src/detect.c|648|version=NetHack 3.6.7}}{{refsrc|src/detect.c|683|version=NetHack 3.6.7}}{{refsrc|src/detect.c|702|version=NetHack 3.6.7}}{{refsrc|src/detect.c|719|version=NetHack 3.6.7}}{{refsrc|src/detect.c|744|version=NetHack 3.6.7}} The hero can navigate the resulting screen from quaffing the potion by moving their cursor to highlight particular objects, and any other key that does not perform a navigation action will exit this screen{{refsrc|src/detect.c|679|version=NetHack 3.6.7}}{{refsrc|src/detect.c|762|version=NetHack 3.6.7|comment=temporary map navigation}}&mdash;the locations of those objects are recorded when returning to normal play. Monsters will not use this potion.
 Quaffing the potion while [[hallucinating]] will have the same effects as described above, but will print different messages and display items as their hallucinated glyphs. If the glyph of a previously-detected object suddenly disappears when it would be within the hero's line of sight, the item(s) in question are buried or submerged.

@@ Line 10: / Line 10: @@
 [[Wizard]]s can start the game with a potion of object detection as any of their three random potions.{{refsrc|src/u_init.c|166|nethack=3.6.7}}
-Potions of object detection make up {{frac|21|500}} (4.2%) of all randomly-generated potions. General [[store]]s and liquor emporiums can stock potions of object detection.
+Potions of object detection make up {{frac|21|500}} (4.2%) of all potions randomly generated on the floor, in general [[shop]]s, or as [[death drop]]s. Liquor emporiums can also stock potions of object detection.
 In The Gnome King's Wine Cellar map of [[Mines' End]], a potion of object detection is always generated within the titular wine cellar at level creation.{{refsrc|dat/mines.des|1042|nethack=3.6.7}}

@@ Line 8: / Line 8: @@
 ==Generation==
-[[Wizard]]s can generate with a potion of object detection as any of their three random starting potions.{{refsrc|src/u_init.c|166|nethack=3.6.7}}
+[[Wizard]]s can start the game with a potion of object detection as any of their three random potions.{{refsrc|src/u_init.c|166|nethack=3.6.7}}
 Potions of object detection make up {{frac|21|500}} (4.2%) of all randomly-generated potions. General [[store]]s and liquor emporiums can stock potions of object detection.
@@ Line 19: / Line 19: @@
 A [[hero]] [[quaffing]] the potion will be shown all objects on the current level and [[exercise]] [[wisdom]] if at least one object is detected, with the exact effects dependent on the potion's [[beatitude]]:{{refsrc|src/potion.c|849|version=NetHack 3.6.7}}{{refsrc|src/potion.c|853|version=NetHack 3.6.7}}
-* An uncursed potion displays the current position of all objects on the level using a blank map, including [[buried]] and underwater objects{{refsrc|src/potion.c|851|version=NetHack 3.6.7|comment=calls <tt>object_detect()</tt> in detect.c}}{{refsrc|src/detect.c|582|version=NetHack 3.6.7|comment=<tt>object_detect()</tt> function}}{{refsrc|src/detect.c|589|version=NetHack 3.6.7}}&mdash;objects not known to the hero will be displayed as their object type, i.e. "a scroll", "a potion", "a bag", etc.
+* An uncursed potion displays the current position of all objects on the level using a blank map, including [[buried]] and underwater objects{{refsrc|src/potion.c|851|version=NetHack 3.6.7|comment=calls <tt>object_detect()</tt> in detect.c}}{{refsrc|src/detect.c|582|version=NetHack 3.6.7|comment=<tt>object_detect()</tt> function}}&mdash;objects not known to the hero will be displayed as their object type, i.e. "a scroll", "a potion", "a bag", etc.
 * A cursed potion will behave the same as an uncursed one, but will additionally display cloaked [[mimic]]s as though they were actual objects (with the "item's" class selected randomly per mimic).{{refsrc|src/detect.c|588|version=NetHack 3.6.7}}{{refsrc|src/detect.c|658|version=NetHack 3.6.7}}{{refsrc|src/detect.c|733|version=NetHack 3.6.7}}
-* A blessed potion will display objects as an uncursed one does, but items that are not in a [[monster]]'s inventory are treated as though the hero handled them up close, and so will have their full object appearance shown (including identified ones where possible).{{refsrc|src/detect.c|591|version=NetHack 3.6.7}}{{refsrc|src/detect.c|619|version=NetHack 3.6.7}}{{refsrc|src/detect.c|630|version=NetHack 3.6.7}}{{refsrc|src/detect.c|641|version=NetHack 3.6.7}}{{refsrc|src/detect.c|655|version=NetHack 3.6.7}} The hero also learns the appearance of all items in their inventory if applicable.
+* A blessed potion will display objects as an uncursed one does, but items that are not in a [[monster]]'s inventory are treated as though the hero handled them up close, and so will have their full object appearance shown (including identified ones where possible).{{refsrc|src/detect.c|589|version=NetHack 3.6.7}}{{refsrc|src/detect.c|619|version=NetHack 3.6.7}}{{refsrc|src/detect.c|630|version=NetHack 3.6.7}}{{refsrc|src/detect.c|641|version=NetHack 3.6.7}}{{refsrc|src/detect.c|655|version=NetHack 3.6.7}} The hero also learns the appearance of all items in their inventory if applicable.
 Stale object markings are always cleared when mapping the level from this effect. Floor items are mapped over buried items, items on the top of piles are mapped over the rest of the pile, and the first item in a monster's inventory is mapped over any items they are standing on.{{refsrc|src/detect.c|608|version=NetHack 3.6.7}}{{refsrc|src/detect.c|648|version=NetHack 3.6.7}}{{refsrc|src/detect.c|683|version=NetHack 3.6.7}}{{refsrc|src/detect.c|702|version=NetHack 3.6.7}}{{refsrc|src/detect.c|719|version=NetHack 3.6.7}}{{refsrc|src/detect.c|744|version=NetHack 3.6.7}} The hero can navigate the resulting screen from quaffing the potion by moving their cursor to highlight particular objects, and any other key that does not perform a navigation action will exit this screen{{refsrc|src/detect.c|679|version=NetHack 3.6.7}}{{refsrc|src/detect.c|762|version=NetHack 3.6.7|comment=temporary map navigation}}&mdash;the locations of those objects are recorded when returning to normal play. Monsters will not use this potion.
-Quaffing the potion while [[hallucinating]] will have the same effects as described above, but will print different messages and display items as their hallucinated glyphs. If the symbol of a detected object suddenly disappears upon the hero moving onto an adjacent square to it, the item(s) in question are buried.
+Quaffing the potion while [[hallucinating]] will have the same effects as described above, but will print different messages and display items as their hallucinated glyphs. If the glyph of a previously-detected object suddenly disappears when it would be within the hero's line of sight, the item(s) in question are buried or submerged.
 ==Strategy==
-Potions of object detection can be quite useful for item detection, whether it involves checking for [[gold]] in [[vault]]s unless they were looted by a digging [[Dwarf (monster)|dwarf]], [[rock mole]] or other monster, or quaffing one at the [[Castle]] to detect where the [[chest]] containing the [[wand of wishing]] is. They can also be very useful when combined with [[magic mapping]] in [[Gehennom]], allowing a hero to prioritize which loot they want without having to walk through the [[maze]]s: be on the lookout for detected [[wand]]s, such as attack wands carried by [[major demon]]s and other humanoid hostiles, or a [[wand of digging]] carried by a [[minotaur]].
+Potions of object detection can be quite useful for item detection, whether it involves checking for [[gold]] in [[vault]]s (unless they were looted by a digging [[Dwarf (monster)|dwarf]], [[rock mole]] or other monster), or learning which tower at the [[Castle]] has the [[chest]] containing the [[wand of wishing]]. They can also be very useful on mapped levels, allowing a hero to prioritize which loot they want&mdash;be on the lookout for detected [[wand]]s, since monsters may be carrying them! Object detection is especially valued when combined with [[magic mapping]] in [[Gehennom]], which reduces the tedium of the [[maze]]s and can alert the hero to attack wands carried by [[major demon]]s and other humanoid hostiles, or a [[wand of digging]] carried by a [[minotaur]].
-The {{+ of|detect treasure}} spell has the same effect as quaffing the potion, but casting it is generally much more difficult than quaffing the potion, so it may be preferred mostly by dedicated casting builds&mdash;however, the spell will not detect cloaked mimics as objects like the cursed potion can, and does not cut into [[carrying capacity]] for more [[weight]]-conscious players unless they opt not to stash its [[spellbook]].
+The {{+ of|detect treasure}} spell has the same effect as quaffing the potion, but [[casting]] it is generally much more difficult and generally left to heroes playing dedicated spell-focused builds&mdash;however, the spell will not detect cloaked mimics as objects like the cursed potion can, and does not cut into [[carrying capacity]] as much for more [[weight]]-conscious players, especially if they opt to stash its [[spellbook]]. Remember that buried and submerged objects will have their glyphs vanish when their squares become visible to the hero&mdash;[[digging]] down with a [[pick-axe]] or [[dwarvish mattock]] on a buried object's formerly-marked square will reveal them, and items that sitting on or embedded in the same square may obscure further buried treasure.
 As they are fairly common due to the presence of nymphs, potions of object detection can be saved up and diluted en masse for [[Holy water|holy]] (or [[Unholy water|unholy]]) water production. Blessed potions of object detection are especially welcome for [[conduct]] play, with [[zen]] being the most notable example: since the hero will be [[blind]] for the entirety of the game, they will not normally see or learn the identities of some objects they pick up, unless those items are bought from a [[shop]]; shopping is also very risky for a zen hero until they gain [[telepathy]] to avoid bumping into unseen [[shopkeeper]]s, and learning object identities often requires selling the item(s) in question to the shop, then buying them back if necessary. The blessed potion is thus one of the better aids a zen hero can obtain for learning object identities.
-[[Smoky potion]]s of object detection are among the best smoky potions to have in a given game when shooting for [[wish]]es: they are plentiful and relatively easy to amass, do not potentially replace a vital necessity as smoky potions of {{! of|full healing}} can, will not be used by monsters, and the most detrimental effect it has when quaffed is potentially mis-labeling a mimic.
+[[Smoky potion]]s of object detection are among the best smoky potions to have in a given game when shooting for [[wish]]es: they are plentiful and relatively easy to amass as a result of nymph generation, do not potentially replace a vital necessity as smoky potions of {{! of|full healing}} can, and will not be used by monsters&mdash;the most detrimental effect it has besides producing a hostile [[djinn]] is potentially mis-identifying a mimic from quaffing a cursed potion.
-Remember that buried objects will have their glyphs vanish when you move adjacent to them, and [[digging]] down with a [[pick-axe]] on their formerly-marked square will reveal them&mdash;items sitting on or embedded in the same tile may obscure further buried treasure. Also, since [[tiles]] ports show unique tiles for unique object descriptions, you can determine the appearance of an object in tiles mode using an uncursed potion; once you've detected it, compare the tile to a list to see what appearance it has.
+Since [[tiles]] ports show unique tiles for unique object descriptions, you can determine the appearance of an object in tiles mode using an uncursed potion; once you've detected it, compare the tile to a list to see what appearance it has.
 ==History==

@@ Line 12: / Line 12: @@
 Potions of object detection make up {{frac|21|500}} (4.2%) of all randomly-generated potions. General [[store]]s and liquor emporiums can stock potions of object detection.
-In The Gnome King's Wine Cellar map of [[Mines' End]], a potion of object detection is always generated within the titular wine cellar at level creation.
+In The Gnome King's Wine Cellar map of [[Mines' End]], a potion of object detection is always generated within the titular wine cellar at level creation.{{refsrc|dat/mines.des|1042|nethack=3.6.7}}
-[[Nymph (monster class)|Nymphs]] have a {{frac|2}} chance of being [[Monster starting inventory|generated with]] a potion of object detection.{{refsrc|src/makemon.c|703|nethack=3.6.7}}
+[[Nymph (monster class)|Nymphs]] have a {{frac|2}} chance of being [[generated with]] a potion of object detection.{{refsrc|src/makemon.c|703|nethack=3.6.7}}
 ==Description==
@@ Line 40: / Line 40: @@
 ==History==
 The potion of object detection first appears in Hack 1.21, Hack for PDP-11 and PC/IX Hack, which are all based on [[Jay Fenlason's Hack]]. It is included in the initial item list for [[Hack 1.0]].
 ==Messages==
@@ Line 52: / Line 54: @@
 ===SLASH'EM===
 In [[SLASH'EM]], [[Flame Mage]]s, [[Ice Mage]]s, [[Necromancer]]s, and [[Wizard/SLASH'EM|Wizards]] may be given a potion of object detection as any of the random potions in their starting inventories.{{refsrc|u_init.c|66|version=SLASH'EM 0.0.7E7F2}}{{refsrc|u_init.c|96|version=SLASH'EM 0.0.7E7F2}}{{refsrc|u_init.c|137|version=SLASH'EM 0.0.7E7F2}}{{refsrc|u_init.c|246|version=SLASH'EM 0.0.7E7F2}}
 ==References==

@@ Line 10: / Line 10: @@
 [[Wizard]]s can generate with a potion of object detection as any of their three random starting potions.{{refsrc|src/u_init.c|166|nethack=3.6.7}}
-Potions of monster detection make up {{frac|21|500}} (4.2%) of all randomly-generated potions. General [[store]]s and liquor emporiums can stock potions of object detection.
+Potions of object detection make up {{frac|21|500}} (4.2%) of all randomly-generated potions. General [[store]]s and liquor emporiums can stock potions of object detection.
 In The Gnome King's Wine Cellar map of [[Mines' End]], a potion of object detection is always generated within the titular wine cellar at level creation.
-Nymphs have a {{frac|2}} chance of being [[Monster starting inventory|generated with]] a potion of object detection.{{refsrc|src/makemon.c|703|nethack=3.6.7}}
+[[Nymph (monster class)|Nymphs]] have a {{frac|2}} chance of being [[Monster starting inventory|generated with]] a potion of object detection.{{refsrc|src/makemon.c|703|nethack=3.6.7}}
 ==Description==
-A hero [[quaffing]] the potion will [[exercise]] [[wisdom]] and be shown all objects on the current level, with the exact effects dependent on the potion's [[beatitude]]:{{refsrc|src/potion.c|849|version=NetHack 3.6.7}}{{refsrc|src/potion.c|853|version=NetHack 3.6.7}}
+A [[hero]] [[quaffing]] the potion will [[exercise]] [[wisdom]] and be shown all objects on the current level, with the exact effects dependent on the potion's [[beatitude]]:{{refsrc|src/potion.c|849|version=NetHack 3.6.7}}{{refsrc|src/potion.c|853|version=NetHack 3.6.7}}
-* An uncursed potion displays the current position of all objects on the level using a blank map, including [[buried]] and underwater objects{{refsrc|src/potion.c|851|version=NetHack 3.6.7|comment=calls <tt>object_detect()</tt> in detect.c}}{{refsrc|src/detect.c|582|version=NetHack 3.6.7|comment=<tt>object_detect()</tt> function}}{{refsrc|src/detect.c|589|version=NetHack 3.6.7}}&mdash;objects not known to the hero will be displayed as their object type.
+* An uncursed potion displays the current position of all objects on the level using a blank map, including [[buried]] and underwater objects{{refsrc|src/potion.c|851|version=NetHack 3.6.7|comment=calls <tt>object_detect()</tt> in detect.c}}{{refsrc|src/detect.c|582|version=NetHack 3.6.7|comment=<tt>object_detect()</tt> function}}{{refsrc|src/detect.c|589|version=NetHack 3.6.7}}&mdash;objects not known to the hero will be displayed as their object type, i.e. "a scroll", "a potion", "a bag", etc.
-* A cursed potion will behave the same as an uncursed one, but will additionally display cloaked [[mimic]]s as though they were actual objects.{{refsrc|src/detect.c|588|version=NetHack 3.6.7}}{{refsrc|src/detect.c|658|version=NetHack 3.6.7}}{{refsrc|src/detect.c|733|version=NetHack 3.6.7}}
+* A cursed potion will behave the same as an uncursed one, but will additionally display cloaked [[mimic]]s as though they were actual objects (with the "item's" class selected randomly per mimic).{{refsrc|src/detect.c|588|version=NetHack 3.6.7}}{{refsrc|src/detect.c|658|version=NetHack 3.6.7}}{{refsrc|src/detect.c|733|version=NetHack 3.6.7}}
-* A blessed potion will display objects as above, but they are treated as though the hero handled them up close, and so will have their full object appearance shown (including identified ones where possible).{{refsrc|src/detect.c|591|version=NetHack 3.6.7}}{{refsrc|src/detect.c|619|version=NetHack 3.6.7}}{{refsrc|src/detect.c|630|version=NetHack 3.6.7}}{{refsrc|src/detect.c|641|version=NetHack 3.6.7}}{{refsrc|src/detect.c|655|version=NetHack 3.6.7}}
+* A blessed potion will display objects as an uncursed one does, but items that are not in a [[monster]]'s inventory are treated as though the hero handled them up close, and so will have their full object appearance shown (including identified ones where possible).{{refsrc|src/detect.c|591|version=NetHack 3.6.7}}{{refsrc|src/detect.c|619|version=NetHack 3.6.7}}{{refsrc|src/detect.c|630|version=NetHack 3.6.7}}{{refsrc|src/detect.c|641|version=NetHack 3.6.7}}{{refsrc|src/detect.c|655|version=NetHack 3.6.7}} The hero also learns the appearance of all items in their inventory if applicable.
-Floor items are mapped over buried items, items on the top of piles are mapped over the rest of the pile, and the first item in a monster's inventory is mapped over any items they are standing on.{{refsrc|src/detect.c|608|version=NetHack 3.6.7}}{{refsrc|src/detect.c|648|version=NetHack 3.6.7}}{{refsrc|src/detect.c|683|version=NetHack 3.6.7}}{{refsrc|src/detect.c|702|version=NetHack 3.6.7}}{{refsrc|src/detect.c|719|version=NetHack 3.6.7}}{{refsrc|src/detect.c|744|version=NetHack 3.6.7}} The hero can navigate the resulting screen from quaffing the potion by moving their cursor to highlight particular objects, and any other key that does not perform a navigation action will exit this screen{{refsrc|src/detect.c|679|version=NetHack 3.6.7}}{{refsrc|src/detect.c|762|version=NetHack 3.6.7|comment=temporary map navigation}}&mdash;the locations of those objects are recorded when returning to normal play.
+Stale object markings are always cleared when mapping the level from this effect. Floor items are mapped over buried items, items on the top of piles are mapped over the rest of the pile, and the first item in a monster's inventory is mapped over any items they are standing on.{{refsrc|src/detect.c|608|version=NetHack 3.6.7}}{{refsrc|src/detect.c|648|version=NetHack 3.6.7}}{{refsrc|src/detect.c|683|version=NetHack 3.6.7}}{{refsrc|src/detect.c|702|version=NetHack 3.6.7}}{{refsrc|src/detect.c|719|version=NetHack 3.6.7}}{{refsrc|src/detect.c|744|version=NetHack 3.6.7}} The hero can navigate the resulting screen from quaffing the potion by moving their cursor to highlight particular objects, and any other key that does not perform a navigation action will exit this screen{{refsrc|src/detect.c|679|version=NetHack 3.6.7}}{{refsrc|src/detect.c|762|version=NetHack 3.6.7|comment=temporary map navigation}}&mdash;the locations of those objects are recorded when returning to normal play. Monsters will not use this potion.
 Quaffing the potion while [[hallucinating]] will have the same effects as described above, but will print different messages and display items as their hallucinated glyphs. If the symbol of a detected object suddenly disappears upon the hero moving onto an adjacent square to it, the item(s) in question are buried.
 ==Strategy==
-Potions of object detection can be used to remotely detect the exact location of [[vaults]], which will display as a 2x2 square of gold symbols unless the vault was looted, e.g. by a digging [[Dwarf (monster)|dwarf]] or a [[rock mole]]. They are also sometimes saved for the [[Castle]] as an easy way to detect where the [[chest]] containing the [[wand of wishing]] is.
+Potions of object detection can be quite useful for item detection, whether it involves checking for [[gold]] in [[vault]]s unless they were looted by a digging [[Dwarf (monster)|dwarf]], [[rock mole]] or other monster, or quaffing one at the [[Castle]] to detect where the [[chest]] containing the [[wand of wishing]] is. They can also be very useful when combined with [[magic mapping]] in [[Gehennom]], allowing a hero to prioritize which loot they want without having to walk through the [[maze]]s: be on the lookout for detected [[wand]]s, such as attack wands carried by [[major demon]]s and other humanoid hostiles, or a [[wand of digging]] carried by a [[minotaur]].
-Potions of object detection can also be very useful when combined with [[magic mapping]] in [[Gehennom]] - a player can quickly pass through Gehennom after locating all the [[staircase]]s and prioritize which loot they want without having to walk through the [[maze]]s. Be on the lookout for detected [[wand]]s, as they may signify a [[wand of digging]] carried by a [[minotaur]].
+The {{+ of|detect treasure}} spell has the same effect as quaffing the potion, but casting it is generally much more difficult than quaffing the potion, so it may be preferred mostly by dedicated casting builds&mdash;however, the spell will not detect cloaked mimics as objects like the cursed potion can, and does not cut into [[carrying capacity]] for more [[weight]]-conscious players unless they opt not to stash its [[spellbook]].
-As they are fairly common due to nymphs being generated with them, potions of object detection can be saved up and diluted en masse for [[Holy water|holy]] (or [[Unholy water|unholy]]) water production.
+As they are fairly common due to nymphs being generated with them, potions of object detection can be saved up and diluted en masse for [[Holy water|holy]] (or [[Unholy water|unholy]]) water production. Blessed potions of object detection are especially welcome for [[conduct]] play, with [[zen]] being the most notable example: since the hero will be [[blind]] for the entirety of the game, they will not normally see or learn the identities of some objects they pick up, unless those items are bought from a [[shop]]; shopping is also very risky until the hero gains [[telepathy]] to avoid bumping into unseen [[shopkeeper]]s, and learning those object identities often requires selling them to the shop, then buying them back if necessary. The blessed potion is thus one of the better aids a zen hero can obtain for learning object identities.
 Remember that buried objects will have their glyphs vanish when you move adjacent to them, and [[digging]] down with a [[pick-axe]] on their formerly-marked square will reveal them&mdash;items sitting on or embedded in the same tile may obscure further buried treasure. Also, since [[tiles]] ports show unique tiles for unique object descriptions, you can determine the appearance of an object in tiles mode using an uncursed potion; once you've detected it, compare the tile to a list to see what appearance it has.
 ==Messages==
-{{message|You have a strange feeling for a moment, then it passes.|No objects on the level.<br/>You are a [[beginner]] and not hallucinating.}}
+{{message|You have a <strange/normal> feeling for a moment, then it passes.|You quaffed the potion as a beginner and found no objects on the level, with "normal" used if you are also [[hallucinating]].}}
-{{message|You have a normal feeling for a moment, then it passes.|No objects on the level.<br/>You are a [[beginner]] and hallucinating.}}
+{{message|You sense the presence of <objects/something>.|You quaffed the potion and detected objects, with "something" used if you are also hallucinating.}}
-{{message|You feel a lack of something.|There were remembered, now gone, objects.}}
+{{message|You sense <objects/something> nearby.|You quaffed the potion and the only detected objects were on your square, with "something" used if you are also hallucinating.}}
-{{message|You sense objects nearby.|The only objects detected are on your square.<br/>You are not hallucinating.}}
-{{message|You sense something nearby.|The only objects detected are on your square.<br/>You are hallucinating.}}
+{{message|You sense the absence of objects.|As above, but no objects were detected.}}
-{{message|You sense the presence of objects.|Objects detected.<br/>You are not hallucinating.}}
+{{message|You feel a lack of something.|As above, but the potion also cleared the screen of remembered object locations.}}
 ==Variants==
@@ Line 53: / Line 56: @@
 <references/>
 {{DOD}}
-{{nethack-366}}
+{{nethack-367}}
 [[Category:Potions|Object detection]]