In Photoshop or any image editing program that allows you to create lens flares, create a 512x512 image and fill it in black. Create a lens flare in the center of the image, and then save and exit the program. In Bryce, make a 2D verticle face(the flat square under DaVinci's arm on the Create pallete), then click the "M" to enter the Materials Lab. Import the lens flare into the Picture Editor in all 3 channels. To do this, select the first dot next to Ambient on the COLOR Palette, and set the component to picture(Click the "P"). Then in the VALUE Palette, select the first dots on Diffusion and Ambience and set the slider to 100, and in the OPTICS section at the bottom, select the first dot next to Transperancy and set it's slider to 100. Lastly, select the small arrow at the top of the screen to open the Shading Mode menu, Select Normal, and deselect all other options. Click the exit checkmark at the bottom of the screen and your done.