[Request]A option in material to remove reflection from skylight and ambient cubelight

If someone use Skylight or an Ambient Cubemap the reflection of them on a large area like water is to dominant, an option in the material is needed to remove them from the reflection. Or better to be able the adjust the reflection 0%-100%

without Ambient Cubemap (the shadow from the mountain on the lake is seen):

with Ambient Cubemap (the shadow from the mountain on the lake is not seen):

in this link are screenshots with Skylights:
[link text][3]

You can get a different reflection on it by creating sphere and box reflection captures and placing them in your area with correct sizes and scales, this would make sure it overrides the sky reflection.