@behrooz, I can only Say WOW about those flames reflections, the background is not as good as the rest of the image, But from the quality of your render I can tell you that’s propably because you didn’t have much time.
Hope to see your work on challange 7.
@fulg0re, first I must say that I like your attitude, you’ve been working on this for quite a while now, but still there is a problem with the reflections.
-Try mapping a hemisphere with a “dim room” panoramic image and place it behind the camera. the reflections on your vase give away the fact that there’s no enviroment around the scene (it reflects pure black in parts where there is nothing to reflect)