I did a lot of rework, but I do have now what I want. An obj with different groups and materials and a *.cr2 created with a hier file (by using PHI builder). The obj raised from 402kByte to 460kByte. The *.cr2 went from 4MByte to 143kByte without losing functionality. I love it. Still have to get rid of all unwanted parts in the .cr2. Any idea where I can get infos about '.cr2 inside' Next are the Pose files for switching on/off parts and the MAT files. - Walter