diff --git a/main.py b/main.py
index 7f912dc..cb3a8b6 100644
--- a/main.py
+++ b/main.py
@@ -5,7 +5,7 @@ import gdpc.exceptions
 from world_maker.world_maker import *
 from world_maker.data_analysis import transpose_form_heightmap
 from world_maker.Skeleton import Skeleton, simplify_coordinates
-from world_maker.terraforming import remove_trees
+from world_maker.terraforming import remove_trees, smooth_terrain
 from networks.geometry.Point3D import Point3D
 from networks.roads_2.Road import Road
 from networks.legacy_roads import roads
@@ -21,8 +21,10 @@ def main():
     buildArea = editor.getBuildArea()
     origin = ((buildArea.begin).x, (buildArea.begin).z)
 
-    remove_trees('./world_maker/data/heightmap.png',
-                 './world_maker/data/treemap.png', './world_maker/data/smooth_sobel_watermap.png')
+    # remove_trees('./world_maker/data/heightmap.png', './world_maker/data/treemap.png',
+    #              './world_maker/data/smooth_sobel_watermap.png')
+    smooth_terrain('./world_maker/data/heightmap.png',
+                   './world_maker/data/heightmap_smooth.png', './world_maker/data/smooth_sobel_watermap.png')
 
     # set_roads(skeleton_mountain, origin)
     # set_roads(skeleton_highway, origin)
diff --git a/world_maker/data/building.png b/world_maker/data/building.png
index 4d8c79a..7160ed9 100644
Binary files a/world_maker/data/building.png and b/world_maker/data/building.png differ
diff --git a/world_maker/data/city_map.png b/world_maker/data/city_map.png
index ae6e3f8..a6d60e6 100644
Binary files a/world_maker/data/city_map.png and b/world_maker/data/city_map.png differ
diff --git a/world_maker/data/district.png b/world_maker/data/district.png
index c4193b7..d8191d3 100644
Binary files a/world_maker/data/district.png and b/world_maker/data/district.png differ
diff --git a/world_maker/data/heightmap.png b/world_maker/data/heightmap.png
index b379956..b961768 100644
Binary files a/world_maker/data/heightmap.png and b/world_maker/data/heightmap.png differ
diff --git a/world_maker/data/heightmap_smooth.png b/world_maker/data/heightmap_smooth.png
new file mode 100644
index 0000000..e366caa
Binary files /dev/null and b/world_maker/data/heightmap_smooth.png differ
diff --git a/world_maker/data/highwaymap.png b/world_maker/data/highwaymap.png
index dc3fecf..eda2e82 100644
Binary files a/world_maker/data/highwaymap.png and b/world_maker/data/highwaymap.png differ
diff --git a/world_maker/data/mountain_map.png b/world_maker/data/mountain_map.png
index 89ef441..57e7a16 100644
Binary files a/world_maker/data/mountain_map.png and b/world_maker/data/mountain_map.png differ
diff --git a/world_maker/data/removed_treesmap.png b/world_maker/data/removed_treesmap.png
index f41640e..ad74f8b 100644
Binary files a/world_maker/data/removed_treesmap.png and b/world_maker/data/removed_treesmap.png differ
diff --git a/world_maker/data/roadmap.png b/world_maker/data/roadmap.png
index da2b612..b5fbd37 100644
Binary files a/world_maker/data/roadmap.png and b/world_maker/data/roadmap.png differ
diff --git a/world_maker/data/skeleton_highway.png b/world_maker/data/skeleton_highway.png
index 9ac6485..a486dcd 100644
Binary files a/world_maker/data/skeleton_highway.png and b/world_maker/data/skeleton_highway.png differ
diff --git a/world_maker/data/skeleton_highway_area.png b/world_maker/data/skeleton_highway_area.png
index 6a9ecf9..4ca5c47 100644
Binary files a/world_maker/data/skeleton_highway_area.png and b/world_maker/data/skeleton_highway_area.png differ
diff --git a/world_maker/data/skeleton_mountain.png b/world_maker/data/skeleton_mountain.png
index 44968bb..8b2fae1 100644
Binary files a/world_maker/data/skeleton_mountain.png and b/world_maker/data/skeleton_mountain.png differ
diff --git a/world_maker/data/skeleton_mountain_area.png b/world_maker/data/skeleton_mountain_area.png
index 7010d14..dd64749 100644
Binary files a/world_maker/data/skeleton_mountain_area.png and b/world_maker/data/skeleton_mountain_area.png differ
diff --git a/world_maker/data/smooth_sobel_watermap.png b/world_maker/data/smooth_sobel_watermap.png
index 64c79e6..df4efa0 100644
Binary files a/world_maker/data/smooth_sobel_watermap.png and b/world_maker/data/smooth_sobel_watermap.png differ
diff --git a/world_maker/data/smooth_terrain_delta.png b/world_maker/data/smooth_terrain_delta.png
new file mode 100644
index 0000000..85e44d0
Binary files /dev/null and b/world_maker/data/smooth_terrain_delta.png differ
diff --git a/world_maker/data/sobelmap.png b/world_maker/data/sobelmap.png
index 4020e72..2147614 100644
Binary files a/world_maker/data/sobelmap.png and b/world_maker/data/sobelmap.png differ
diff --git a/world_maker/data/treemap.png b/world_maker/data/treemap.png
index 474d635..a721eb6 100644
Binary files a/world_maker/data/treemap.png and b/world_maker/data/treemap.png differ
diff --git a/world_maker/data/watermap.png b/world_maker/data/watermap.png
index 7010d14..38472c6 100644
Binary files a/world_maker/data/watermap.png and b/world_maker/data/watermap.png differ
diff --git a/world_maker/data_analysis.py b/world_maker/data_analysis.py
index 361d654..a04fa60 100644
--- a/world_maker/data_analysis.py
+++ b/world_maker/data_analysis.py
@@ -105,7 +105,7 @@ def filter_sobel(image: Union[str, Image]) -> Image:
     return image
 
 
-def filter_smooth(image: Union[str, Image], radius: int = 3):
+def filter_smooth_theshold(image: Union[str, Image], radius: int = 3):
     """
     :param image: white and black image representing the derivative of the terrain (sobel), where black is flat and white is very steep.
     :param radius: Radius of the Gaussian blur.
@@ -135,6 +135,14 @@ def filter_smooth(image: Union[str, Image], radius: int = 3):
     return Image.fromarray(bool_array)
 
 
+def filter_smooth(image: Union[str, Image], radius: int = 3):
+
+    image = handle_import_image(image)
+    image = image.convert('L')
+    image = image.filter(ImageFilter.GaussianBlur(radius))
+    return image
+
+
 def subtract_map(image: Union[str, Image], substractImage: Union[str, Image]) -> Image:
     image = handle_import_image(image)
     substractImage = handle_import_image(substractImage).convert('L')
@@ -163,7 +171,7 @@ def group_map(image1: Union[str, Image], image2: Union[str, Image]) -> Image:
 
 def filter_smooth_array(array: np.ndarray, radius: int = 3) -> np.ndarray:
     image = Image.fromarray(array)
-    smooth_image = filter_smooth(image, radius)
+    smooth_image = filter_smooth_theshold(image, radius)
     array = np.array(smooth_image)
     return array
 
@@ -182,7 +190,7 @@ def filter_remove_details(image: Union[str, Image], n: int = 20) -> Image:
 
 def highway_map() -> Image:
     print("[Data Analysis] Generating highway map...")
-    smooth_sobel = filter_smooth("./world_maker/data/sobelmap.png", 1)
+    smooth_sobel = filter_smooth_theshold("./world_maker/data/sobelmap.png", 1)
     negative_smooth_sobel = filter_negative(smooth_sobel)
     negative_smooth_sobel_water = subtract_map(
         negative_smooth_sobel, './world_maker/data/watermap.png')
@@ -247,7 +255,7 @@ def smooth_sobel_water() -> Image:
     watermap = filter_negative(
         filter_remove_details(filter_negative(watermap), 5))
     sobel = handle_import_image("./world_maker/data/sobelmap.png")
-    sobel = filter_remove_details(filter_smooth(sobel, 1), 2)
+    sobel = filter_remove_details(filter_smooth_theshold(sobel, 1), 2)
     group = group_map(watermap, sobel)
     group = filter_negative(group)
     group.save('./world_maker/data/smooth_sobel_watermap.png')
diff --git a/world_maker/terraforming.py b/world_maker/terraforming.py
index 28455b2..73b047e 100644
--- a/world_maker/terraforming.py
+++ b/world_maker/terraforming.py
@@ -1,14 +1,14 @@
 from typing import Union
 
 import numpy as np
-from gdpc import Editor, Block, geometry
+from gdpc import Editor, Block, geometry, lookup
 from PIL import Image
 from skimage import morphology
 
 from world_maker.data_analysis import handle_import_image
 
 
-def remove_trees(heightmap: Union[str, Image], treesmap: Union[str, Image], mask: Union[str, Image], ):
+def remove_trees(heightmap: Union[str, Image], treesmap: Union[str, Image], mask: Union[str, Image]):
 
     editor = Editor(buffering=True)
     build_area = editor.getBuildArea()
@@ -29,7 +29,7 @@ def remove_trees(heightmap: Union[str, Image], treesmap: Union[str, Image], mask
     for x in range(0, distance[0]):
         for z in range(0, distance[1]):
 
-            if mask.getpixel((x, z)) == 255 and treesmap.getpixel((x, z)) > 0 and (x, z) not in removed:
+            if mask.getpixel((x, z)) != 0 and treesmap.getpixel((x, z)) > 0 and (x, z) not in removed:
 
                 treeArea = morphology.flood(treesmap, (z, x), tolerance=1)
                 blend = Image.blend(Image.fromarray(treeArea).convert(
@@ -52,3 +52,48 @@ def remove_trees(heightmap: Union[str, Image], treesmap: Union[str, Image], mask
                 y_top = removed_treesmap.getpixel((x, z))
                 geometry.placeLine(
                     editor, (start[0] + x, y+1, start[1] + z), (start[0] + x, y_top, start[1] + z), Block('air'))
+
+
+def smooth_terrain(heightmap: Union[str, Image], heightmap_smooth: Union[str, Image], mask: Union[str, Image]):
+
+    editor = Editor()
+    build_area = editor.getBuildArea()
+    build_rectangle = build_area.toRect()
+
+    start = build_rectangle.begin
+
+    distance = (max(build_rectangle.end[0], build_rectangle.begin[0]) - min(build_rectangle.end[0], build_rectangle.begin[0]), max(
+        build_rectangle.end[1], build_rectangle.begin[1]) - min(build_rectangle.end[1], build_rectangle.begin[1]))
+
+    heightmap = handle_import_image(heightmap).convert('L')
+    heightmap_smooth = handle_import_image(heightmap_smooth).convert('L')
+    mask = handle_import_image(mask).convert('L')
+
+    smooth_terrain_delta = Image.new("RGB", distance, 0)
+
+    slice = editor.loadWorldSlice(build_rectangle)
+    smoothable_blocks = lookup.OVERWORLD_SOILS | lookup.OVERWORLD_STONES | lookup.SNOWS
+
+    for x in range(0, distance[0]):
+        for z in range(0, distance[1]):
+
+            if mask.getpixel((x, z)) != 0:
+                y = heightmap.getpixel((x, z))
+                y_smooth = heightmap_smooth.getpixel((x, z))
+                delta = y - y_smooth
+                smooth_terrain_delta.putpixel((x, z), delta)
+
+                if delta != 0:
+                    block = slice.getBlock((x, y, z))
+                    if block.id in smoothable_blocks:
+                        if delta > 0:
+                            geometry.placeLine(
+                                editor, (start[0] + x, y, start[1] + z), (start[0] + x, y_smooth, start[1] + z), Block('air'))
+                            editor.placeBlock(
+                                (start[0] + x, y_smooth, start[1] + z), block)
+
+                        else:
+                            geometry.placeLine(
+                                editor, (start[0] + x, y, start[1] + z), (start[0] + x, y_smooth, start[1] + z), block)
+
+    smooth_terrain_delta.save('./world_maker/data/smooth_terrain_delta.png')
diff --git a/world_maker/world_maker.py b/world_maker/world_maker.py
index a007e62..5ac439a 100644
--- a/world_maker/world_maker.py
+++ b/world_maker/world_maker.py
@@ -1,7 +1,7 @@
 from world_maker.World import World
 from PIL import Image
 from world_maker.data_analysis import (get_data, filter_negative, rectangle_2D_to_3D, skeleton_mountain_map, highway_map, filter_sobel, skeleton_highway_map,
-                                       smooth_sobel_water, subtract_map, detect_mountain)
+                                       smooth_sobel_water, subtract_map, detect_mountain, filter_smooth)
 from world_maker.City import City
 from world_maker.Position import Position
 from random import randint
@@ -11,8 +11,13 @@ from world_maker.pack_rectangle import generate_building
 def world_maker():
     world = World()
     heightmap, watermap, treemap = get_data(world)
+
+    filter_smooth(
+        './world_maker/data/heightmap.png', 4).save('./world_maker/data/heightmap_smooth.png')
+
     filter_sobel(
         "./world_maker/data/heightmap.png").save('./world_maker/data/sobelmap.png')
+
     smooth_sobel_water_map = smooth_sobel_water()
     skeleton_highway = skeleton_highway_map(highway_map())
     city = City()