Yeah, in my first expiriments with IBL that's what I was using. Just snap shots. That's what got me started trying to figure out how they were being handled. Here's a potential example If you wanted to use a square snapshot for an IBL source but the light source was way up in one corner you probably wouldn't get the intended results. The light in the corner would not get sampled. In a case like that a paint program that has a Polar Coordinate filter could be used to roll the image up in a ball. It wouldn't be exact, but at least the entire image gets sampled. Nerd3D