In my crusade against facelights, I am striking the killing blow. Add a

DisableFacelights option to OpenSim.ini to finally kill those immersion-
breaking, silly vanity lights that destroy nighttime RP. Girls, you look
just fine without them. Guys, you too. Thank you. Melanie has left the building.

OpenSim/Region/ClientStack/LindenUDP/LLClientView.cs

@@ -314,6 +314,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
         private int m_cachedTextureSerial;
         private PriorityQueue m_entityUpdates;
         private Prioritizer m_prioritizer;
+        private bool m_disableFacelights = false;
 
         /// <value>
         /// List used in construction of data blocks for an object update packet.  This is to stop us having to
@@ -407,6 +408,12 @@ namespace OpenSim.Region.ClientStack.LindenUDP
             set { m_IsLoggingOut = value; }
         }
 
+        public bool DisableFacelights
+        {
+            get { return m_disableFacelights; }
+            set { m_disableFacelights = value; }
+        }
+
         public bool SendLogoutPacketWhenClosing { set { m_SendLogoutPacketWhenClosing = value; } }
 
         #endregion Properties
@@ -3487,6 +3494,20 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                 EntityUpdate update;
                 while (updatesThisCall < maxUpdates && m_entityUpdates.TryDequeue(out update))
                 {
+                    if (update.Entity is SceneObjectPart)
+                    {
+                        SceneObjectPart part = (SceneObjectPart)update.Entity;
+
+                        if (part.ParentGroup.IsAttachment && m_disableFacelights)
+                        {
+                            if (part.ParentGroup.RootPart.Shape.State != (byte)AttachmentPoint.LeftHand &&
+                                part.ParentGroup.RootPart.Shape.State != (byte)AttachmentPoint.RightHand)
+                            {
+                                part.Shape.LightEntry = false;
+                            }
+                        }
+                    }
+
                     ++updatesThisCall;
 
                     #region UpdateFlags to packet type conversion

OpenSim/Region/ClientStack/LindenUDP/LLUDPServer.cs

@@ -153,6 +153,8 @@ namespace OpenSim.Region.ClientStack.LindenUDP
         private int m_defaultRTO = 0;
         private int m_maxRTO = 0;
 
+        private bool m_disableFacelights = false;
+
         public Socket Server { get { return null; } }
 
         public LLUDPServer(IPAddress listenIP, ref uint port, int proxyPortOffsetParm, bool allow_alternate_port, IConfigSource configSource, AgentCircuitManager circuitManager)
@@ -190,6 +192,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
 
                 m_defaultRTO = config.GetInt("DefaultRTO", 0);
                 m_maxRTO = config.GetInt("MaxRTO", 0);
+                m_disableFacelights = config.GetBoolean("DisableFacelights", false);
             }
             else
             {
@@ -898,6 +901,8 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                 LLClientView client = new LLClientView(remoteEndPoint, m_scene, this, udpClient, sessionInfo, agentID, sessionID, circuitCode);
                 client.OnLogout += LogoutHandler;
 
+                client.DisableFacelights = m_disableFacelights;
+
                 // Start the IClientAPI
                 client.Start();
             }

bin/OpenSim.ini.example

@@ -387,6 +387,13 @@
     ;
     ;TextureSendLimit = 20
 
+    ; Quash and remove any light properties from attachments not on the
+    ; hands. This allows flashlights and lanterns to function, but kills
+    ; silly vanity "Facelights" dead. Sorry, head mounted miner's lamps
+    ; will also be affected.
+    ;
+    ;DisableFacelights = "false"
+
 [Chat]
     ; Controls whether the chat module is enabled.  Default is true.
     enabled = true;