Gradual Sandblasting to clear on one pane of glass

Im trying to create a material that is opaque at hte bottom and gradually becomes transparent at the top. Ive made a glass material and using the blend material with a mask of a gradient jpg black to white. Its giving me the effect however the part that hsould be white (as it is a white marterial) being blended with the glass where it is white it is showing black.. anyone have any suggestions?

IKind Regards

Ryan

Is the diffuse black? maybe you need white or a mix between white and a texture that looks like sand blasted glass.. Maybe some vray fog on the inside to break that clearness up too, with a gradient in the density.

A gradient in the refract roughness should do the trick for sandblasted glass.