Go into your material lab (click on the M for the selection), enter the pic library (put 'marble' in the first column to bring up that dialog box), then when in the pic library, click on the far right upper triangle (you can do this from terrain library also) and then find your plug in folder for KPT6. KPT3 is already included in Bryce. My plugin folder is in PSP6, so to use KPT5, I browsed to that (could use any or all of my plugins). Then when you have the pic (or terrain) you wish to use your filter on in your 3 squares, click on the triangle, choose your filter. Diane B