diff -r dab60d247b75 -r a089326f0e16 share/hedgewars/Data/Shaders/default.fs
--- a/share/hedgewars/Data/Shaders/default.fs	Sun Jan 07 18:19:00 2018 +0100
+++ b/share/hedgewars/Data/Shaders/default.fs	Sun Jan 07 19:01:06 2018 +0100
@@ -4,6 +4,7 @@
 
 uniform sampler2D tex0;
 uniform vec4 tint;
+uniform bool tintAdd;
 uniform bool enableTexture;
 
 varying vec2 tex;
@@ -12,7 +13,12 @@
 void main()
 {
     if(enableTexture){
-        gl_FragColor = texture2D(tex0, tex) * tint;
+        if (tintAdd){
+            tint.a = 0.0;
+            gl_FragColor = clamp(texture2D(tex0, tex) + tint, 0.0, 1.1);
+        }else{
+            gl_FragColor = texture2D(tex0, tex) * tint;
+        }
     }else{
         gl_FragColor = tint;
     }