See also my response in this thread: https://www.renderosity.com/mod/forumpro/?thread_id=2905031 re: mCasual's DS and Blender scripts for doing this. Works with multiple items at once (although it choked when I tried it with a Stonemason set ) and sets up very basic Cycles shaders for you (with diffuse, glossy, bump and transparency only - any extra maps you need to set up yourself).