I’ve only recently delved into Kerkythea and found that it produces a fairly convincing render. By adding materials in Sketchup, then rendering in Kerkythea, the result is ok. It takes quite a bit of time though, especially if you’ve got a lot of lights in your model.
You can see some ‘quick’ renders at my blog, http://mitlandskab.blogspot.com/ (I say quick, because all I did was add and adjust lights, set a spherical sky in the setting, and hit render…)
