How do i stop an object from being counted in the precomputed static visibility?

How do i stop an object from being counted in the precomputed static visibility? I found how to stop the object from being occluded by setting it to “treat as background” but it still actually blocks other models which i do not want it to do… The model basically replaces an entire building when it gets far enough away, but in the foreground when your close i want it invisible and the smaller meshes that make up the building up close to be visible… Right now some of htose smaller meshes are getting culled because of hte precomputed static visiblity when your walking near by… mainly do to the large replacement mesh being used to make the engine think those meshes should be included…

Actually treat as background is still making the other objects be occluded… not quite sure what to do here… help!