diff --git a/FFXIVClientStructs/FFXIV/Client/Game/Object/EventObject.cs b/FFXIVClientStructs/FFXIV/Client/Game/Object/EventObject.cs
index 853becd45..373434683 100644
--- a/FFXIVClientStructs/FFXIV/Client/Game/Object/EventObject.cs
+++ b/FFXIVClientStructs/FFXIV/Client/Game/Object/EventObject.cs
@@ -11,6 +11,14 @@ public partial struct EventObject {
     [FieldOffset(0x1B2)] public ushort SharedTimelineState; // ActorControl category 0x199 (SetSharedTimelineState) sets this field
     [FieldOffset(0x1B8)] public byte Flags;
 
+    /// <summary> Plays or switches an EObj animation/effect slot. </summary>
+    /// <param name="sharedTimelineState"> Similar to MapEffect's a2. Does not appear to affect the actual visible animation directly. </param>
+    /// <param name="bitMask"> Similar to MapEffect's a3. Each bit represents one animation (e.g. show, fadeout). Appears to use only single-bit values. </param>
+    /// <param name="a4"> Unknown </param>
+    /// <remarks>
+    /// EObjAnimation is highly similar to MapEffect; MapEffect appears to be a wrapped form of this mechanism.
+    /// Different scene-bound resources attached to an EObj are roughly equivalent to MapEffect's a1.
+    /// </remarks>
     [MemberFunction("E8 ?? ?? ?? ?? E9 ?? ?? ?? ?? 4D 85 F6 0F 84 ?? ?? ?? ?? 8B 44 24 70 BE ?? ?? ?? ??")]
-    public partial void PlayAnimation(uint entityId, uint actionId, ulong unknown);
+    public partial void PlayAnimation(uint sharedTimelineState, uint bitMask, uint a4 = 0);
 }