diff --git a/Effects/tree.eff b/Effects/tree.eff
index bdd18cdc7..5c2d8b95b 100644
--- a/Effects/tree.eff
+++ b/Effects/tree.eff
@@ -132,7 +132,7 @@
       </uniform>
       <uniform>
         <name>season</name>
-        <type>int</type>
+        <type>float</type>
         <value><use>season</use></value>
       </uniform>
       <uniform>
@@ -254,7 +254,7 @@
       </uniform>
       <uniform>
         <name>season</name>
-        <type>int</type>
+        <type>float</type>
         <value><use>season</use></value>
       </uniform>
       <uniform>
@@ -310,7 +310,7 @@
 			</program>
       <uniform>
         <name>season</name>
-        <type>int</type>
+        <type>float</type>
         <value><use>season</use></value>
       </uniform>
 			<uniform>
@@ -412,7 +412,7 @@
 			</uniform>
       <uniform>
         <name>season</name>
-        <type>int</type>
+        <type>float</type>
         <value><use>season</use></value>
       </uniform>
 			<!-- 			END fog include -->
@@ -506,7 +506,7 @@
 			</uniform>
       <uniform>
         <name>season</name>
-        <type>int</type>
+        <type>float</type>
         <value><use>season</use></value>
       </uniform>
 			<!-- 			END fog include -->
@@ -598,7 +598,7 @@
 			</uniform>
       <uniform>
         <name>season</name>
-        <type>int</type>
+        <type>float</type>
         <value><use>season</use></value>
       </uniform>
 		</pass>
diff --git a/Shaders/deferred-tree.vert b/Shaders/deferred-tree.vert
index f19595b57..edc4d6b17 100644
--- a/Shaders/deferred-tree.vert
+++ b/Shaders/deferred-tree.vert
@@ -5,7 +5,7 @@
 // color - xyz of tree quad origin, replicated 4 times.
 #version 120
 
-uniform int season;
+uniform float season;
 
 void main() {
 
diff --git a/Shaders/tree-haze.vert b/Shaders/tree-haze.vert
index 83a36ba97..f16ea2ebf 100644
--- a/Shaders/tree-haze.vert
+++ b/Shaders/tree-haze.vert
@@ -38,7 +38,7 @@ uniform float overcast;
 //uniform float scattering;
 uniform float ground_scattering;
 uniform float snow_level;
-uniform int   season;
+uniform float season;
 
 float earthShade;
 float mie_angle;
diff --git a/Shaders/tree.vert b/Shaders/tree.vert
index 3a50f5491..0f03a4d0e 100644
--- a/Shaders/tree.vert
+++ b/Shaders/tree.vert
@@ -12,7 +12,7 @@
 //
 // void fog_Func(int type);
 // /////////////////////////
-uniform int season;
+uniform float season;
 
 void main(void)
 {