Change tree texture format from a 8x4 block to 32x1 to avoid UV bleeding problems.

Shaders/deferred-tree.vert

@@ -11,10 +11,9 @@ void main() {
 
     // Texture coordinates
     float numVarieties = gl_Normal.z;
-    float texFract = floor(fract(gl_MultiTexCoord0.x) * numVarieties) / numVarieties;
-    texFract += floor(gl_MultiTexCoord0.x) / numVarieties;
-    gl_TexCoord[0] = vec4(texFract, gl_MultiTexCoord0.y, 0.0, 0.0);  
-    gl_TexCoord[0].y =  gl_TexCoord[0].y + 0.5 * season;
+		float texFract = floor(fract(gl_MultiTexCoord0.x) * numVarieties) / (numVarieties * 4.0);
+		texFract += floor(gl_MultiTexCoord0.x) / (numVarieties * 4.0);
+    gl_TexCoord[0] = vec4(texFract + 0.5 * season, gl_MultiTexCoord0.y, 0.0, 0.0);  
     
     // Position and scaling
     vec3 position = gl_Vertex.xyz * gl_Normal.xxy;

Shaders/tree-haze.vert

@@ -75,18 +75,17 @@ void main()
 // this code is copied from tree.vert
 
   float numVarieties = gl_Normal.z;
-  float texFract = floor(fract(gl_MultiTexCoord0.x) * numVarieties) / numVarieties;
-  texFract += floor(gl_MultiTexCoord0.x) / numVarieties;
+  float texFract = floor(fract(gl_MultiTexCoord0.x) * numVarieties) / (numVarieties * 4.0);
+  texFract += floor(gl_MultiTexCoord0.x) / (numVarieties * 4.0);
   
   // Determine the rotation for the tree.  The Fog Coordinate provides rotation information
   // to rotate one of the quands by 90 degrees.  We then apply an additional position seed
   // so that trees aren't all oriented N/S
   float sr = sin(gl_FogCoord + gl_Color.x);
   float cr = cos(gl_FogCoord + gl_Color.x);
-  gl_TexCoord[0] = vec4(texFract, gl_MultiTexCoord0.y, 0.0, 0.0);
   
-  // Determine the y texture coordinate based on whether it's summer, winter, snowy.
-  gl_TexCoord[0].y =  gl_TexCoord[0].y + 0.25 * int(gl_Color.z > snow_level) + 0.5 * season;
+  // Shift texture to account for snow level and seasons
+  gl_TexCoord[0] = vec4(texFract + 0.25 * int(gl_Color.z > snow_level) + 0.5 * season, gl_MultiTexCoord0.y, 0.0, 0.0);
   
   // scaling
   vec3 position = gl_Vertex.xyz * gl_Normal.xxy;

Shaders/tree.vert

@@ -17,16 +17,15 @@ uniform int season;
 void main(void)
 {
   float numVarieties = gl_Normal.z;
-  float texFract = floor(fract(gl_MultiTexCoord0.x) * numVarieties) / numVarieties;
-  texFract += floor(gl_MultiTexCoord0.x) / numVarieties;
+  float texFract = floor(fract(gl_MultiTexCoord0.x) * numVarieties) / (numVarieties * 4.0);
+  texFract += floor(gl_MultiTexCoord0.x) / (numVarieties * 4.0);
   
   // Determine the rotation for the tree.  The Fog Coordinate provides rotation information
   // to rotate one of the quands by 90 degrees.  We then apply an additional position seed
   // so that trees aren't all oriented N/S
   float sr = sin(gl_FogCoord + gl_Color.x);
   float cr = cos(gl_FogCoord + gl_Color.x);
-  gl_TexCoord[0] = vec4(texFract, gl_MultiTexCoord0.y, 0.0, 0.0);
-  gl_TexCoord[0].y =  gl_TexCoord[0].y + 0.5 * season;
+  gl_TexCoord[0] = vec4(texFract + 0.5 * season, gl_MultiTexCoord0.y, 0.0, 0.0);
 
   // scaling
   vec3 position = gl_Vertex.xyz * gl_Normal.xxy;