I've been using this new rendering software since it was first released in this year. My workflow was to export from Sketchup to Thea. To use a VW model I had to make all the textures again an flip backfaces inside sketchup, it was a huge work everytime, so I was not using my VW models for the job.
I've just figured out how to use VW + Thea together. Thea will import VW files with textures if you export them as.3ds from VW. When you import them inside Thea you will be able to change materials, put some lights add cameras. Just be aware to the correct scale when you import your files. Scale 1 means 1 unit = 1 meter.
Thea has both biased and unbiased rendering engines. I always use final gather because is very fast and good too. But if you have time, you can use unbiased engine and it will look like indigo renderer and maxwell images. Thea can render fancy light animations too.
I am not a rendering professional, but, to illustrate I will post here one image showing the model imported from VW, rendered in Thea in less than 3 minutes. And one interior I've made using Sketchup + Thea one month ago, this interior took about 20 minutes to render.
Thea is a new software so it is really cheap by now... I've paid like U$ 200,00 for it, I don't remember exactly.
I hope you enjoy the workflow too. If someone thinks that a videotutorial with a heavy accent and a lot of mistakes might help I can post some for U.