yes, that's exactly what I'm referring to. In your image, the figure you are using has at least one texture map -- likely 2 if it's a more recent figure -- for the body and/or head. This would show up in the material room. That map will be located somewhere in yor Textures folder within your poser runtime (Poser/Runtime/Textures). The largest dimension of that map would be the number to put in the MTR.