Hello, wanted to share my latest work, hope you like it 
Took me 5h to render (60 samples, woohoo), then re-render tower separately, and combining in photoshop, since it was too noisy.
Nice effects and all, but its too noisy/grainy.
Nice smoke on the back there.
You should render at least 200 samples minimum.
My renders take about 2-4 days on 1000 plus samples.