diff --git a/TSOClient/tso.world/Components/3DFloorGeometry.cs b/TSOClient/tso.world/Components/3DFloorGeometry.cs
index 8a7ab1e68..0ccd0d573 100644
--- a/TSOClient/tso.world/Components/3DFloorGeometry.cs
+++ b/TSOClient/tso.world/Components/3DFloorGeometry.cs
@@ -275,7 +275,7 @@ private Vector4 GetParallaxMatrix(WorldState state)
         }
 
         public void DrawFloor(GraphicsDevice gd, GrassEffect e, WorldZoom zoom, WorldRotation rot, List<Texture2D> roommaps, HashSet<sbyte> floors, EffectPass pass, 
-            Matrix? lightWorld = null, WorldState state = null, int minFloor = 0, bool screenAlignUV = false)
+            Matrix? lightWorld = null, WorldState state = null, int minFloor = 0, bool screenAlignUV = false, bool withCeilings = false)
         {
             bool is3D = state?.CameraMode == CameraRenderMode._3D;
             var parallax = WorldConfig.Current.Complex;
@@ -290,7 +290,7 @@ public void DrawFloor(GraphicsDevice gd, GrassEffect e, WorldZoom zoom, WorldRot
             e.ScreenAlignUV = screenAlignUV;
             var baseRS = gd.RasterizerState;
 
-            if (lightWorld == null)
+            if (withCeilings)
             {
                 gd.RasterizerState = RasterizerState.CullCounterClockwise;
             }
@@ -495,7 +495,7 @@ public void DrawFloor(GraphicsDevice gd, GrassEffect e, WorldZoom zoom, WorldRot
                     }
                     gd.DrawIndexedPrimitives(PrimitiveType.TriangleList, 0, 0, type.Value.GeomForOffset.Count * 2);
 
-                    if (f > 1 && is3D && lightWorld == null)
+                    if (f > 1 && is3D && withCeilings)
                     {
                         // Draw ceilings in 3D mode.
                         gd.RasterizerState = RasterizerState.CullClockwise;
diff --git a/TSOClient/tso.world/Components/Geometry/Modelled3DFloor.cs b/TSOClient/tso.world/Components/Geometry/Modelled3DFloor.cs
index 6e35bbc9e..455cd94ea 100644
--- a/TSOClient/tso.world/Components/Geometry/Modelled3DFloor.cs
+++ b/TSOClient/tso.world/Components/Geometry/Modelled3DFloor.cs
@@ -63,9 +63,12 @@ protected void AppendTile(List<int> inds, List<TerrainParallaxVertex> verts, Mod
 
             var srcInds = tile.Indices;
             var indLength = srcInds.Length;
-            for (int i=0; i<indLength; i++)
+            for (int i=0; i<indLength; i+=3)
             {
+                // Flip the triangles to match the terrain geometry.
                 inds.Add(srcInds[i] + baseInd);
+                inds.Add(srcInds[i + 2] + baseInd);
+                inds.Add(srcInds[i + 1] + baseInd);
             }
 
             var baseX = (int)Math.Max(1, Math.Min(Bp.Width - 1, tileBaseX));
diff --git a/TSOClient/tso.world/Components/TerrainComponent.cs b/TSOClient/tso.world/Components/TerrainComponent.cs
index 327451b0d..6a115fa71 100644
--- a/TSOClient/tso.world/Components/TerrainComponent.cs
+++ b/TSOClient/tso.world/Components/TerrainComponent.cs
@@ -525,7 +525,7 @@ public override void Draw(GraphicsDevice device, WorldState world){
             var floors = new HashSet<sbyte>();
             for (sbyte f = 0; f < world.Level; f++) floors.Add(f);
             var pass = Effect.CurrentTechnique.Passes[(_3d) ? 2 : WorldConfig.Current.PassOffset];
-            Bp.FloorGeom.DrawFloor(device, Effect, world.Zoom, world.Rotation, world.Rooms.RoomMaps, floors, pass, state: world, screenAlignUV: !nonIso);
+            Bp.FloorGeom.DrawFloor(device, Effect, world.Zoom, world.Rotation, world.Rooms.RoomMaps, floors, pass, state: world, screenAlignUV: !nonIso, withCeilings: true);
             Effect.GrassShininess = 0.02f;// (float)0.25);
 
             pass.Apply();