ok, for the sake of helping you out, I’m gonna give some critique:
rendering time:
3 hrs of rendering time for a scene like this is horrible. actually, 3 MINUTES of rendering time for something like this would be horrible.
lighting:
HEMI lamps should only be used in extreme cases. Also, I don’t see the need for 4 hemi lamps in any case. hemi lamps give overall lighting (aka, non-directional) so you could just as well use 1 light and tweak the settings for intensity.
The clipping of the 5 spotlights is visible on the pilar, you could tweak the width and distance to get rid of that.
OSA:
OSA 16 is nice and all, but it is meant to remove jagged edges. as you can see on that stone-thingies, they are so low-poly that you see the edges anyway…I would recommend fixing that.
4)AO:
Resist the urge to use AO on everything you do. I don’t think it is needed in this scene.
I hope I helped you a bit with this, remember that I’m not trying to be harsh!
Also, lowering the image size would make the pic easier to view (I’m running at 1152x864 and I have to scroll to be view the entire image), and lowering the filesize would make the people on dialup a little happier ;).
Good start! One thing you might experiment with is setting OA to SUB and turning up the power a bit.