Also, if you want to use some of those jpegs and don't need a perfect reflection, or are doing a close up image that would have blurred reflections of distant objects, then take them into photoshop. Change the image size to 4.. to 6 times its original size, then blur the hell out of it using gaussian blur. You can also add hot spots at this point where you will be 'relatively' placing the lights on the inside of the sphere. When you place it in bryce, use it as a 100% ambient materia on the booleaned sphere.