Shadding Foil:: We had fallen in a Problem

Last week we had a problem with Shading Foil.Our one marketing person show us a 'art work' where art work was looking like shading.i.e. somewhere was cloudy(not clear),some where was clear to look.We are sure this kind of Foil paper was not available in market.There's Matt foil paper in the market ............on the Golden and Silver color.

We were confused how to do it.Our marketing person who was also unable to give us an idea about those kind of Foil printing; and what their customer wants.