You can behave this as you like:-). When you use the MAT for the first time, Vue will ask you to locate it. Save your material when you have located the bitmap and Vue will find it next time if... you don't move it to another folder. So, if you rename it before you do so, remember the original name and the new name so you can find it easy. I keep all the bitmaps in "guittamat" bitmap folder and the mats in a "guittamat" folder. But you can do it as you like:-). Same for functions. :-)Guitta