Examples: Clean up.

examples/webgl_shaders_sky.html

@@ -44,7 +44,7 @@
 					mieDirectionalG: 0.8,
 					inclination: 0.49, // elevation / inclination
 					azimuth: 0.25, // Facing front,
-					exposure: 0.25
+					exposure: renderer.toneMappingExposure
 				};
 
 				function guiChanged() {