I addressed the problem of the non-circular circle 
done in blender, rendered w/ yable-yafray.
Arnaud
Not bad for a newbie 
Though a complete waste of time to render it in a raytracer.
You can achieve exactly the same realism with Blender’s renderer and 3 seconds rendertime.
Not quite, the reflections inside the horn are impossible to achieve in Blender so that they’d look realistic.
Nice work btw 
cool, i can see some jaggies round the skinny bit
maybe wrap some cord arund where the two tubes are adjacent?
I tried in Blender, and found that
(and thanks for the compliment, Jolly Gnome).
I have NOT tried to use motion blur to achieve depth of field, but it doesn’t seem right because of the direction it is meant to suggest is unlike a true focus blur… by definition.
Yafray does it very well (not overdoing it).
Bottom line, between reflections (and the reflection’s reflection) and the depth of field, I don’t believe Blender was the right choice.
BUT it’s definitely true that the horn’s pipe (or whatever it’s called) is not quite circular and it does bother me. I’ll try to make time to address it.
Find a casual TV viewer who notices that the reflections inside the horn are not realistic