V-ray is a plug-in, originally designed for 3DS max,but works equally well on a VIZ platform,...Actually, it's just a rendering engine, like Mentalray or FinalRender, with the difference that it's efficient, very fast and inexpensive,...you know,.....one of those small pieces of software that pull the strings of such heavy monsters like 3DS max or viz. So all you need to do is place your building in max and have it rendered with V-ray. There are some special V-ray materials but not many, so it'll take you a day or two to learn but it's not necessary to apply them every time you decide to v-ray your view...I think that it is a wonderful combination Revit+Viz(Max)+Vray. Unfortunetely, Vray does not work with VIZ Render.....if you take any interest,
http://www.vrayrender.com/.....I wouldn't dare post a picture as the above url contains plenty of marvellous renderings.
In my view, Vray is the best software out of all these simulating diffuse light (radiosity) softwares now on the market and if you ask me I would not wish to have Accurender with Revit, V-ray would be a much better choice.......
....and last but not least, it supports distributed rendering and it's a matter of a few clicks to have it initiated and see the results in a poster size.