diff --git a/Tools/iconsmooth.py b/Tools/iconsmooth.py
index ddc5578dc6..4cd53ca8b8 100644
--- a/Tools/iconsmooth.py
+++ b/Tools/iconsmooth.py
@@ -49,8 +49,8 @@ src_img = PIL.Image.open(input_name)
 input_row = src_img.size[0] // tile_w
 
 tiles = []
-# 48 is the amount of tiles that usually exist
-for i in range(48):
+# 48 is the amount of tiles that usually exist, but 56 covers walls with diagonal variants.
+for i in range(56):
     tile = PIL.Image.new("RGBA", (tile_w, tile_h))
     tx = i % input_row
     ty = i // input_row
diff --git a/Tools/iconsmooth_lib.py b/Tools/iconsmooth_lib.py
index 012385b6c2..370238b1b1 100644
--- a/Tools/iconsmooth_lib.py
+++ b/Tools/iconsmooth_lib.py
@@ -49,6 +49,21 @@ conversion_modes = {
             [ 46, 46, 46, 46], # 7 : Full
         ]
     ),
+    # TG
+    "tg_shuttle": ConversionMode(
+        7, 9,
+        [
+            # BR, TL, TR, BL
+            [  0,  0,  0,  0],
+            [ 16, 16,  3,  3],
+            [  0,  0,  0,  0],
+            [ 16, 16,  3,  3],
+            [  3,  3, 16, 16],
+            [ 19, 19, 19, 19],
+            [  3,  3, 16, 16],
+            [ 54, 54, 54, 54],
+        ]
+    ),
     # Citadel Station
     "citadel": ConversionMode(
         7, 3,