Glass airlocks actually let light through.

Content.Server/GameObjects/Components/Doors/ServerDoorComponent.cs

@@ -8,7 +8,9 @@ using Robust.Shared.GameObjects.Components;
 using Robust.Shared.Interfaces.GameObjects;
 using Robust.Shared.Interfaces.Network;
 using Robust.Shared.Maths;
+using Robust.Shared.Serialization;
 using Robust.Shared.Timers;
+using Robust.Shared.ViewVariables;
 using CancellationTokenSource = System.Threading.CancellationTokenSource;
 
 namespace Content.Server.GameObjects
@@ -38,6 +40,16 @@ namespace Content.Server.GameObjects
         private static readonly TimeSpan OpenTimeTwo = TimeSpan.FromSeconds(0.9f);
         private static readonly TimeSpan DenyTime = TimeSpan.FromSeconds(0.45f);
 
+        [ViewVariables]
+        private bool _occludes;
+
+        public override void ExposeData(ObjectSerializer serializer)
+        {
+            base.ExposeData(serializer);
+
+            serializer.DataField(ref _occludes, "occludes", true);
+        }
+
         public override void Initialize()
         {
             base.Initialize();
@@ -136,7 +148,7 @@ namespace Content.Server.GameObjects
 
             State = DoorState.Opening;
             SetAppearance(DoorVisualState.Opening);
-            if (Owner.TryGetComponent(out OccluderComponent occluder))
+            if (_occludes && Owner.TryGetComponent(out OccluderComponent occluder))
             {
                 occluder.Enabled = false;
             }
@@ -194,7 +206,7 @@ namespace Content.Server.GameObjects
             {
                 State = DoorState.Closed;
                 SetAppearance(DoorVisualState.Closed);
-                if (Owner.TryGetComponent(out OccluderComponent occluder))
+                if (_occludes && Owner.TryGetComponent(out OccluderComponent occluder))
                 {
                     occluder.Enabled = true;
                 }

Resources/Prototypes/Entities/buildings/airlock_base.yml

@@ -50,3 +50,13 @@
 
   placement:
     mode: SnapgridCenter
+
+- type: entity
+  id: airlock_glass
+  parent: airlock
+  components:
+  - type: Airlock
+    occludes: false
+
+  - type: Occluder
+    enabled: false

Resources/Prototypes/Entities/buildings/airlock_types.yml

@@ -49,7 +49,7 @@
     sprite: Buildings/airlock_medical.rsi
 
 - type: entity
-  parent: airlock
+  parent: airlock_glass
   id: airlock_medical_glass
   name: Glass Medical Airlock
   components:
@@ -59,6 +59,7 @@
   - type: Icon
     sprite: Buildings/airlock_medical_glass.rsi
 
+
 - type: entity
   parent: airlock
   id: airlock_science
@@ -71,7 +72,7 @@
     sprite: Buildings/airlock_science.rsi
 
 - type: entity
-  parent: airlock
+  parent: airlock_glass
   id: airlock_science_glass
   name: Glass Science Airlock
   components: