Do you add lighting to the scene before rendering? I do. Maybe it's a result of lighting? But I've tried rendering my tubes with just the default lights in Poser, and the images looked really awful. Does anyone have any ideas on what is causing this jaggy light coloured border and how to get rid of it?

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi