Matte Shader in Multiblend

Hi please help...
I need to build a layered shader with a matte shader (black hole) as a base. It's complicated but I need all my shading to be 2-sided, there are transparent textures in there and the bottom layer needs to be a matte.
I cannot plug the matte shader in any layered node, any quick idea?...
Thanks
I need to build a layered shader with a matte shader (black hole) as a base. It's complicated but I need all my shading to be 2-sided, there are transparent textures in there and the bottom layer needs to be a matte.
I cannot plug the matte shader in any layered node, any quick idea?...
Thanks