diff --git a/grf/alpine/alpine.py b/grf/alpine/alpine.py
index 6fad7dab18..c93dfb2b46 100644
--- a/grf/alpine/alpine.py
+++ b/grf/alpine/alpine.py
@@ -66,6 +66,28 @@ def tmpl_infrastructure_road(func, **kw):
     tmpl_level_ground(func, 642, 152, **kw)
 
 
+def tmpl_infrastructure_railtunnels(func, **kw):
+    tmpl_long_slope  (func,   2, 200, **kw)
+    func(82, 152, 64, 39, xofs=-31, yofs=-38, **kw)
+    tmpl_short_slope (func,  82, 200, **kw)
+    func(162, 152, 64, 23, xofs=-31, yofs=-30, **kw)
+    tmpl_short_slope (func, 162, 200, **kw)
+    func(242, 152, 64, 23, xofs=-31, yofs=-30, **kw)
+    tmpl_long_slope  (func, 242, 200, **kw)
+    func(322, 152, 64, 39, xofs=-31, yofs=-38, **kw)
+
+
+def tmpl_temperate_road_tunnels_grid(func, **kw):
+    func(113, 27, 64, 39, xofs=-31, yofs=-8)
+    func(193, 27, 64, 39, xofs=-31, yofs=-38)
+    func(653, 27, 64, 23, xofs=-31, yofs=0)
+    func(733, 27, 64, 23, xofs=-31, yofs=-30)
+    func(337, 27, 64, 23, xofs=-31, yofs=0)
+    func(417, 27, 64, 23, xofs=-31, yofs=-30)
+    func(877, 27, 64, 39, xofs=-31, yofs=-8)
+    func(957, 27, 64, 39, xofs=-31, yofs=-38)
+
+
 def replace_ground_sprites(sprite_id, file, x, y, **kw):
     png = grf.ImageFile(file)
     gen.add_sprite(grf.ReplaceSprites([(sprite_id, 19)]))
@@ -96,6 +118,13 @@ def replace_additional_rough_sprites(sprite_id, file, x, y, **kw):
     sprite(160+x, y, 64, 31, xofs=-31, yofs=0, **kw)
     sprite(240+x, y, 64, 31, xofs=-31, yofs=0, **kw)
 
+
+def replace_sprites_template(sprite_id, amount, file, func):
+    png = grf.ImageFile(file)
+    gen.add_sprite(grf.ReplaceSprites([(sprite_id, amount)]))
+    func(lambda *args, **kw: gen.add_sprite(grf.FileSprite(png, *args, **kw)))
+
+
 # Normal land
 replace_ground_sprites(3981, 'gfx/grass_grid_temperate.gimp.png', 1, 1)
 
@@ -112,9 +141,7 @@ replace_additional_rough_sprites(4019, 'gfx/rough_grid_temperate.gimp.png', 1511
 replace_ground_sprites(4023, 'gfx/rocks_grid_temperate.gimp.png', 1, 1)
 
 # road sprites
-png = grf.ImageFile('gfx/infrastructure/road_grid_temperate.gimp.png')
-gen.add_sprite(grf.ReplaceSprites([(1332, 19)]))
-tmpl_infrastructure_road(lambda *args, **kw: gen.add_sprite(grf.FileSprite(png, *args, **kw)))
+replace_sprites_template(1332, 19, 'gfx/infrastructure/road_grid_temperate.gimp.png', tmpl_infrastructure_road)
 
 # different snow densities:
 # replace_ground_sprites(4493, 'gfx/snow14_grid_alpine.gimp.png', 1, 1)
@@ -125,6 +152,10 @@ replace_ground_sprites(4512, 'gfx/snow_transition_2.png', 1, 1)
 replace_ground_sprites(4531, 'gfx/snow_transition_3.png', 1, 1)
 replace_ground_sprites(4550, 'gfx/snow_grid.gimp.png', 1, 1)
 
+replace_sprites_template(2365, 8, 'gfx/infrastructure/tunnel_rail_grid_temperate.gimp.png', tmpl_infrastructure_railtunnels)
+replace_sprites_template(2389, 8, 'gfx/infrastructure_road_tunnel_grid.png', tmpl_temperate_road_tunnels_grid)
+
+
 # shore sprites (replacing 16 seems to do these as well)
 # replace_shore_sprites(4062, 'gfx/water/seashore_grid_temperate.gimp.png', 1, 1)
 
@@ -284,7 +315,7 @@ for i in range(81):
         size=(1, 1),
         climate=0xf,
         eol_date=0,
-        flags=grf.Object.Flags.HAS_NO_FOUNDATION | grf.Object.Flags.ALLOW_UNDER_BRIDGE | grf.Object.Flags.CANNOT_REMOVE,
+        flags=grf.Object.Flags.HAS_NO_FOUNDATION | grf.Object.Flags.ALLOW_UNDER_BRIDGE | grf.Object.Flags.AUTOREMOVE,
     ))
 
 
diff --git a/grf/alpine/gen_sprites.py b/grf/alpine/gen_sprites.py
index 34b017c53e..90857ed3fb 100644
--- a/grf/alpine/gen_sprites.py
+++ b/grf/alpine/gen_sprites.py
@@ -89,6 +89,16 @@ def gen_land_recolor():
         return x
     return gen_recolor(func)
 
+def gen_land_recolor2():
+    def func(x):
+        r, g, b = x.rgb
+        if 3 * g / 2 > r + b:
+            x = x.blend(spectra.rgb(0.7, 1, 0), ratio=0.05)
+            x = x.saturate(10)
+        return x
+    return gen_recolor(func)
+
+
 def remap_file(f_in, f_out, palmap):
     print(f"Converting {f_out}...")
     im = grf.open_image(f_in)
@@ -102,7 +112,6 @@ def remap_file(f_in, f_out, palmap):
 SOURCE_DIR = "/home/pavels/Projects/cmclient/local/ogfx-landscape-1.1.2-source/src/gfx"
 DEST_DIR = "gfx"
 land_palmap = gen_land_recolor()
-
 for fname in ("grass_grid_temperate.gimp.png",
               "bare03_grid.gimp.png",
               "bare13_grid_temperate.gimp.png",
@@ -115,10 +124,19 @@ for fname in ("grass_grid_temperate.gimp.png",
               "snow34_grid_alpine.gimp.png",
               "snow_grid.gimp.png",
               "water/seashore_grid_temperate.gimp.png",
-              "infrastructure/road_grid_temperate.gimp.png",
+
+              "infrastructure/tunnel_rail_grid_temperate.gimp.png",
+              "infrastructure_road_tunnel_grid.png",
               ):
     remap_file(os.path.join(SOURCE_DIR, fname), os.path.join(DEST_DIR, fname), land_palmap)
 
+
+land_palmap = gen_land_recolor2()
+for fname in ("infrastructure_road_tunnel_grid.png",
+              "infrastructure/road_grid_temperate.gimp.png",):
+    remap_file(os.path.join(SOURCE_DIR, fname), os.path.join(DEST_DIR, fname), land_palmap)
+
+
 def meadow_recolor(x):
     x = x.blend(spectra.rgb(0.7, 1, 0), ratio=0.2)
     return x.blend(spectra.rgb(1, 1, 0), ratio=0.4)
diff --git a/grf/alpine/gfx/infrastructure/road_grid_temperate.gimp.png b/grf/alpine/gfx/infrastructure/road_grid_temperate.gimp.png
index f19ea21229..0dd7d11953 100644
Binary files a/grf/alpine/gfx/infrastructure/road_grid_temperate.gimp.png and b/grf/alpine/gfx/infrastructure/road_grid_temperate.gimp.png differ
diff --git a/grf/alpine/gfx/infrastructure/tunnel_rail_grid_temperate.gimp.png b/grf/alpine/gfx/infrastructure/tunnel_rail_grid_temperate.gimp.png
new file mode 100644
index 0000000000..0225ef7630
Binary files /dev/null and b/grf/alpine/gfx/infrastructure/tunnel_rail_grid_temperate.gimp.png differ
diff --git a/grf/alpine/gfx/infrastructure_road_tunnel_grid.png b/grf/alpine/gfx/infrastructure_road_tunnel_grid.png
new file mode 100644
index 0000000000..5ed7f62b45
Binary files /dev/null and b/grf/alpine/gfx/infrastructure_road_tunnel_grid.png differ
diff --git a/grf/alpine/gfx/snow_transition_1.png b/grf/alpine/gfx/snow_transition_1.png
index 125e717df3..2fef85a1f9 100644
Binary files a/grf/alpine/gfx/snow_transition_1.png and b/grf/alpine/gfx/snow_transition_1.png differ
diff --git a/grf/alpine/gfx/snow_transition_2.png b/grf/alpine/gfx/snow_transition_2.png
index 05f90492cb..9ae5be3c4e 100644
Binary files a/grf/alpine/gfx/snow_transition_2.png and b/grf/alpine/gfx/snow_transition_2.png differ
diff --git a/grf/alpine/gfx/snow_transition_3.png b/grf/alpine/gfx/snow_transition_3.png
index 7d36103a5a..5ebc33d652 100644
Binary files a/grf/alpine/gfx/snow_transition_3.png and b/grf/alpine/gfx/snow_transition_3.png differ