Caitlin, for now you have to download the pictures you want to use, but there is a program called HDRshop that will convert cubic images into spherical ones. A cubic projection is similar to spherical. You have an unfolded cube picture that gets folded up and you look around inside of it. Bryce can't use this format, so you would have to use HDRshop to convert the cube faces into a spherical projecion. Unfortunately, the software is not online right now.