diff --git a/Materials/regions/california.xml b/Materials/regions/california.xml
index 6d83d0a7b..6fa6fccf5 100644
--- a/Materials/regions/california.xml
+++ b/Materials/regions/california.xml
@@ -50,11 +50,11 @@
     <name>Grass</name>
     <name>Airport</name>
     <name>AirportKeep</name>
-    <effect>Effects/airfield</effect>
+    <effect>Effects/grass</effect>
     <texture-set>
       <texture>Terrain/california-airport.png</texture>
-      <texture n="13">Terrain/california-airport.png</texture>
-      <texture n="14">Terrain/grass_dry2.png</texture>
+      <texture n="13">Terrain/grass_dry2.png</texture>
+      <texture n="14">Terrain/california-airport.png</texture>
       <texture n="15">Terrain/airport_grass_structure_overlay2.png</texture>
       <texture n="20">Terrain/grass_dry2.png</texture>
     </texture-set>
@@ -62,14 +62,14 @@
       <grit_alpha>0.2</grit_alpha>
       <base_layer_magnification>1.0</base_layer_magnification>
       <use_overlay>1</use_overlay>
-      <overlay_layer_magnification>8.0</overlay_layer_magnification>
+      <overlay_layer_magnification>1.0</overlay_layer_magnification>
       <overlay_alpha>1.0</overlay_alpha>
-      <overlay_bias>-0.2</overlay_bias>
+      <overlay_bias>0.125</overlay_bias>
       <use_grain>1</use_grain>
       <grain_layer_magnification>50.0</grain_layer_magnification>
       <use_color_overlay>0</use_color_overlay>
       <max_grass_height>0.35</max_grass_height>
-      <grass_density>1.5</grass_density>
+      <grass_density>1.0</grass_density>
       <grass_groups>2</grass_groups>
       <grass_modulate_by_overlay>1</grass_modulate_by_overlay>
       <grass_modulate_height_min>0.0</grass_modulate_height_min>
diff --git a/Materials/regions/iceland.xml b/Materials/regions/iceland.xml
index 975a02c72..5f5d2de8e 100644
--- a/Materials/regions/iceland.xml
+++ b/Materials/regions/iceland.xml
@@ -23,24 +23,25 @@
     <effect>Effects/grass</effect>
     <texture-set>
       <texture>Terrain/airport-grass-summer2.png</texture>
-      <texture n="13">Terrain/airport-grass-summer2.png</texture>
-      <texture n="14">Terrain/airport_grass_structure_overlay1.png</texture>
-      <texture n="20">Terrain/airport-grass-summer2.png</texture>
+      <texture n="13">Terrain/airport-grass-summer3.png</texture>
+      <texture n="14">Terrain/rocks-lava.png</texture>
+      <texture n="15">Terrain/airport_grass_structure_overlay1.png</texture>
+      <texture n="20">Terrain/airport-grass-summer3.png</texture>
     </texture-set>
     <parameters>
       <grit_alpha>0.4</grit_alpha>
-      <use_overlay>1</use_overlay>
-      <overlay_layer_magnification>16.0</overlay_layer_magnification>
-      <overlay_bias>0.5</overlay_bias>
-      <use_color_overlay>0</use_color_overlay>
       <base_layer_magnification>1.0</base_layer_magnification>
-      <use_grain>0</use_grain>
-      <grain_layer_magnification>1.0</grain_layer_magnification>
-      <overlay_alpha>1.0</overlay_alpha>
+      <use_overlay>1</use_overlay>
+      <overlay_layer_magnification>8.0</overlay_layer_magnification>
+      <overlay_bias>0.125</overlay_bias>
+      <overlay_alpha>0.75</overlay_alpha>
+      <use_color_overlay>0</use_color_overlay>
+      <use_grain>1</use_grain>
+      <grain_layer_magnification>8.0</grain_layer_magnification>
       <max_grass_height>0.3</max_grass_height>
       <grass_density>1.0</grass_density>
       <grass_groups>2</grass_groups>
-      <grass_modulate_by_overlay>0</grass_modulate_by_overlay>
+      <grass_modulate_by_overlay>1</grass_modulate_by_overlay>
       <grass_modulate_height_min>0.0</grass_modulate_height_min>
     </parameters>
     <xsize>256</xsize>
diff --git a/Textures/Terrain/airport-grass-summer3.png b/Textures/Terrain/airport-grass-summer3.png
new file mode 100644
index 000000000..c60c84451
Binary files /dev/null and b/Textures/Terrain/airport-grass-summer3.png differ