Hallo erverybody, does anyone of you have the same problem. After loading OL files in PView and select in 3D viewer a part using RM and PROPERTIES you can set density and material in PHYSICAL Tab. Assign one material to a selected part and close the window. Save the EDZ file and reopen it and you will see that the density list will be empty expect the default value. The same happens if i use Properties of the PS tree selection and deactivate INHERIT MATERIAL and select one from the list. Save the EDZ file, close and reopen it. Again the list of density is empty. Does anyone knows where the default value is storred in whcih file of PView. I have not fined any entry of density in the registry. May someone can help how to save densities or make them standard in the client installation by inserting them to a special file of PView? Cheers