So, it seems that Fallout 4 uses Material Swap forms to change the material, and thus the texture, of a static. They have done this with the flags you can place in your base. All those flags uses FlagWallMinutemen01.nif as model, and Material Swap to change the diffuse, normal, and specular. The nif itself only references the Minutemen texture and material.
Does anyone have an idea of how one would go about editing those materials? I've tried Hex Editing, but it doesn't seem to work.
For example, I'm working on a Flag mod that doesn't replace the vanilla flags, but adds all sorts of "Old World" flags (download). The missing piece is just getting the materials to function as I want.