Phobos-developers · NetsuNegi · Mar 23, 2026 · Mar 23, 2026
diff --git a/CREDITS.md b/CREDITS.md
@@ -515,6 +515,7 @@ This page lists all the individual contributions to the project by their author.
   - Add toggle of whether shield use ArmorMultiplier or not
   - Fix an Ares bug that led to erroneous interactions where the parasite would frequently reset to the victim's position under specific circumstances and that was highly prone to crashes
   - Fix the bug that if paradropping technos with `Crashable=yes` has been destroyed in air, they will falling down on ground but not dead
+  - Fix the bug that low-air taking off / landing objects will receive twice damage
 - **Apollo** - Translucent SHP drawing patches
 - **ststl**:
   - Customizable `ShowTimer` priority of superweapons

diff --git a/docs/Fixed-or-Improved-Logics.md b/docs/Fixed-or-Improved-Logics.md
@@ -311,6 +311,7 @@ This page describes all ingame logics that are fixed or improved in Phobos witho
 - Fixed the bug that unit will play crashing voice & sound when dropped by warhead with `IsLocomotor=yes`.
 - Fixed an issue that retaliation will make the unit keep switching among multiple targets with the same amount of threat.
 - Fixed the bug that if paradropping technos with `Crashable=yes` has been destroyed in air, they will falling down on ground but not dead.
+- Fixed the bug that low-air taking off / landing objects will receive twice damage.
 
 ## Fixes / interactions with other extensions
 

diff --git a/docs/Whats-New.md b/docs/Whats-New.md
@@ -621,6 +621,7 @@ Vanilla fixes:
 - Voxel drawing code now skips sections that are invisible (have all zeros in the transform matrix main diagonal, meaning that the scale is 0% on all axes), thus increasing drawing performance for some voxels (by Kerbiter & ZivDero)
 - Fixed the bug that unit will play crashing voice & sound when dropped by warhead with `IsLocomotor=yes` (by NetsuNegi)
 - Fixed the bug that if paradropping technos with `Crashable=yes` has been destroyed in air, they will falling down on ground but not dead (by NetsuNegi)
+- Fixed the bug that low-air taking off / landing objects will receive twice damage (by NetsuNegi)
 
 Phobos fixes:
 - Fixed the bug that `AllowAirstrike=no` cannot completely prevent air strikes from being launched against it (by NetsuNegi)

diff --git a/docs/locale/zh_CN/LC_MESSAGES/CREDITS.po b/docs/locale/zh_CN/LC_MESSAGES/CREDITS.po
@@ -1682,6 +1682,11 @@ msgid ""
 msgstr ""
 "修复了当 `Crashable=yes` 的科技类型在空降时被于半空中摧毁，它会落地但不会死亡的 Bug"
 
+msgid ""
+"Fix the bug that low-air taking off / landing objects will receive "
+"twice damage"
+msgstr "修复了低空起飞/降落的物体会受到两次伤害的 Bug"
+
 msgid "**Apollo** - Translucent SHP drawing patches"
 msgstr "**Apollo** - 半透明 SHP 绘制补丁"
 

diff --git a/docs/locale/zh_CN/LC_MESSAGES/Fixed-or-Improved-Logics.po b/docs/locale/zh_CN/LC_MESSAGES/Fixed-or-Improved-Logics.po
@@ -1594,6 +1594,11 @@ msgid ""
 "been destroyed in air, they will falling down on ground but not dead."
 msgstr "修复了当 `Crashable=yes` 的科技类型在空降时被于半空中摧毁，它会落地但不会死亡的 Bug。"
 
+msgid ""
+"Fixed the bug that low-air taking off / landing objects will receive "
+"twice damage."
+msgstr "修复了低空起飞/降落的物体会受到两次伤害的 Bug。"
+
 msgid "Fixes / interactions with other extensions"
 msgstr "修复或与其他扩展的交互"
 

diff --git a/docs/locale/zh_CN/LC_MESSAGES/Whats-New.po b/docs/locale/zh_CN/LC_MESSAGES/Whats-New.po
@@ -2112,6 +2112,11 @@ msgid ""
 "been destroyed in air, they will falling down on ground but not dead (by NetsuNegi)"
 msgstr "修复了当 `Crashable=yes` 的科技类型在空降时被于半空中摧毁，它会落地但不会死亡的 Bug（by NetsuNegi）"
 
+msgid ""
+"Fixed the bug that low-air taking off / landing objects will receive "
+"twice damage (by NetsuNegi)"
+msgstr "修复了低空起飞/降落的物体会受到两次伤害的 Bug（by NetsuNegi）"
+
 msgid "Phobos fixes:"
 msgstr "Phobos 过往版本问题修复："
 

diff --git a/src/Misc/Hooks.BugFixes.cpp b/src/Misc/Hooks.BugFixes.cpp
@@ -11,6 +11,8 @@
 #include <Ext/WarheadType/Body.h>
 #include <Ext/Cell/Body.h>
 
+#include <unordered_set>
+
 /*
 	Allow usage of TileSet of 255 and above without making NE-SW broken bridges unrepairable
 
@@ -2327,6 +2329,39 @@ DEFINE_HOOK(0x489E47, DamageArea_RockerItemsFix2, 0x6)
 
 #pragma endregion
 
+#pragma region Low Air Damage Fix
+
+namespace DamageArea_LowAirDamageTemp
+{
+	std::unordered_set<ObjectClass*> Scanned;
+}
+
+DEFINE_HOOK(0x4894B6, MapClass_DamageArea_AirTechno_Record, 0x5)
+{
+	GET(TechnoClass*, pAirTechno, EBX);
+
+	DamageArea_LowAirDamageTemp::Scanned.emplace(pAirTechno);
+
+	return 0;
+}
+
+DEFINE_HOOK(0x489767, MapClass_DamageArea_CheckScanned, 0x6)
+{
+	enum { GoNextObject = 0x4899B3 };
+
+	GET(ObjectClass*, pObject, ESI);
+
+	return DamageArea_LowAirDamageTemp::Scanned.contains(pObject) ? GoNextObject : 0;
+}
+
+DEFINE_HOOK(0x4899DA, MapClass_DamageArea_ClearScanned, 0x7)
+{
+	DamageArea_LowAirDamageTemp::Scanned.clear();
+	return 0;
+}
+
+#pragma endregion
+
 DEFINE_HOOK(0x71A7BC, TemporalClass_Update_DistCheck, 0x6)
 {
 	enum { SkipGameCode = 0x71A82C };