Difference between editor and exe

hi all!
I made a shader that reads the light direction and hack the alpha of the windscreen of the car, to make the feel of a dirt glass and the light that make blind…

here is the result inside the unityeditor:

but if I create the exe the result (same light, same situation) is this:

i’m on deferred path and i’ve added my shader in the always included shaders list…

any ideas?

thanks in advance

I forgot a thing:
the car is into an assetbundle and is loaded dynamically by the main game
the shader is in both projects