Andrea, try to create a new folder and export your file with all the options in that folder . What files do you get there ? .obj and .mtl, i guess ... Also, when you export, Carrara should show an information window at the top of the creen that says something like " exporting shader ..." . Do you have that ? Terri, to rename a shader, select it it the sequencer tray and rename it in the properties tray . You have to be in the assemble room . It's basically the same for all objects and master objects . litst