There are also other specific formats which can used on objects:
Just do it with the same file as the DiffuseMap and add an alpha channel and save this as filename_S. This texture and it´s alpha channel manipulate and set the shininess of our object ingame, it´s like on normal 2D skins, from black (matte) to white (shiny). See this tutorial how to do this on this page. This is the base texture which is visible, no alpha channel here! Save as filename_D. I will explain very quickly what are the specifications and how to save them in the right dds format. We are doing here textures for objects (may also useful for creating mod textures). If you want to make some objects with selfmade textures ( TDNS) you need some textures and the specifications for them.
Tutorial from xrayjay from this address: Objects/Item texture specs
