script to selectively disable fog

but this may be better handled via a custom shader

FogLayerDisable.js

@@ -0,0 +1,20 @@
+/* http://www.unifycommunity.com/wiki/index.php?title=Fog_Layer
+
+/*
+ This script lets you enable and disable per camera.
+ By enabling or disabling the script in the title of the inspector, you can turn fog on or off per camera.
+*/
+
+private var revertFogState = true;
+
+function OnPreRender () {
+    revertFogState = RenderSettings.fog;
+    RenderSettings.fog = false;
+}
+
+function OnPostRender () {
+    RenderSettings.fog = revertFogState;
+}
+
+@script AddComponentMenu ("Rendering/Fog Layer")
+@script RequireComponent (Camera)