Fog FilterPostProcessor hides skybox

I’m having what I imagine is a pretty simple issue. I need fog to hide the camera’s far frustum, but when I add it my skybox is also hidden. Is there some way to make the objects “fade” in like they are coming through fog while still leaving the skybox visible?

it seems i had already saw a @t0neg0d topic speak about this.

Edit : A little search with “Search” in the right side :

Don’t forget to use and abuse it ;).

Do a Google search with jME Google Code shaders. That list has the correct and fixed implementation.