Your renders are looking great, keep it up!
I never understood why lego didn't ever produce a large Munificent-class star frigate (as apparently the Separatist frigates are called, thanks wookieepedia) in the same vein as the Venator as a play-set style model. Oh well, if it was only as good as that Venator, I would have been disappointed anyway. I would be much more interested in your version of the Munificent in comparable scale to your Venator.
Meanwhile maybe it's time I start tinkering in that lego design software... I have spent countless hours in Empyrion building ships, maybe I can transfer that knowledge back over to Legos and produce a good model of the Imperial Light Cruiser :)