Problem with VRayEnvironmentFog

Hay
i use with VRayEnvironmentFog, and when i make scale to Model and props on my location i lost the fog
When i work on smell object this work
i use with this tutorial
http://www.cgmeetup.net/home/maya-and-vray-environment-fog-tutorial/
Thanks

Hi,

Can you show me some render examples or it would be even better if you can post the scene file?