Use images with alpha channels or do following. 1. Create a new image in whatever graphics prog u use (photoshop or?). CREATE THE IMAGE IN THE SAME RATIO AS THE SURFACE YOU ARE GOING TO USE IT ON. ie if a glass door is 4 feet wide and 9 feet high create image with same ratio (300x900 or 600x1800). REMEMBER THAT IT WILL HAVE TO APPLIED TO OBJECT ONCE ONLY AND NOT TILED SO USE ENOUGH RESOLUTION. 2. if you want text or anything else on object put it on image. This includes the details of holes (cracks around edges etc) 3. Save color version of image as whatever.name 4. Now convert original image to greyscale and leave the areas that are holes white. 5. Now save as whateverA.name the A meaning alpha 6. now in material editor in bryce apply the color image to the A position of texture and the greyscale image to the B position. 7. Click the indent under A to right of diffuse and right of Ambient settings 8. Click the indent under B to right of TRANSPARENCY SETTING and make sure that the "blend transparency" option is checked in texture settings option box The object you apply texture to should now have transparent holes (put light behind or in object and point camera at it and render, use spotlight with volumetric settings on to see light rays through holes)