JamesTKhan · JamesTKhan · Apr 20, 2022 · Apr 20, 2022 · Apr 20, 2022
diff --git a/docs/README.md b/docs/README.md
@@ -1,3 +1,4 @@
 # Documents
 
-TBD
+[Terrain](Terrain.md)
+
diff --git a/docs/Terrain.md b/docs/Terrain.md
@@ -16,8 +16,24 @@ If you select it with left click then you can see the terrain in the on the edit
 
 ## Load heightmap
 
-TBD
+You can generate heightmap after selected the terrain.
+You see the settings on the ``Height map`` tab on ``Gen`` tab.
+Here you can select the height map image.
+
+![](images/generate_heightmap.png)
+
+If you select a heightmap and click to the ``Load heightmap`` button than it will modify the selected terrain.
+
+![](images/generated_heightmap.png)
 
 ## Generate Perlin noise
 
-TBD
+You can generate Perlin noise after selected the terrain.
+You see the settings on the ``Perlin noise`` tab on ``Gen`` tab.
+Here you can set the ``Seed``, ``Min height`` and ``Max height``.
+
+![](images/generate_perlin_noise.png)
+
+If you set these values and click to the ``Generate Perlin noise`` button than it will modify the selected terrain.
+
+![](images/generated_perlin_noise.png)
diff --git a/docs/images/generate_heightmap.png b/docs/images/generate_heightmap.png
diff --git a/docs/images/generate_perlin_noise.png b/docs/images/generate_perlin_noise.png
diff --git a/docs/images/generated_heightmap.png b/docs/images/generated_heightmap.png
diff --git a/docs/images/generated_perlin_noise.png b/docs/images/generated_perlin_noise.png