I' am not satisfied with this image.
This image was rendered with megapov, contains only two objects and one light source. I have tried different photons settings. But whenever the number of photons_shot increases, the result is the same. How can I avoid the bright and dark lines (1, 2)?.
The glass is a bezier lathe, and is part of a bigger scene you can look at:

http://ma.usb.ve/~jacob/povgraph/gal2.html