Agreed, I will have a play about with trying some max spots. I think the problem I had originally was the system units were set to cm and the other unit were set to mm and it lead to dodgy lighting.
Are there any settings which are particularlly important when using the max spots in vray or even generally?
I have only just today calibrated my screen to 2.2 6500k using my new spyder2 so I really hope that it is not the screen. It would be nice to be able to see how the image appears on your screen? Is this even possible?
I am starting to think that this is a lighting issue and not an LWF issue. I think that I need more light in the scene - although I am not sure because the whole point of using LWF is that you need LESS light.
Thanks.
Well, if you’ve calibrated your monitor, then maybe its a matter of style. Most of the architects I work for prefer me to overlight their scenes. The biggest concern is often that a white ceiling often looks too dark. I inform them about the reality of lighting and point at the studio ceiling. They then decide to have me overlight the ceiling anyway.
When I was an architect, I thought I was pretty observant of the built environment. Now that I am a full-time visualiser, I’ve realised that most architects are completely ignorant to the laws of physics in relation to how light and reflections work.
Sorry, no offence if you’re an architect… 
Clifton, you are right about architects, but only up to a point. While most architects don’t understand the physics of light, neither do our brains. What we “see” is not what is there but what we “perceive” to be there. When we enter a space, our eyes make a very quick, split second survey of the entire space and our brains process that first response and stores it for further use. Then as we proceed through the space, our brain uses that first survey as the base point for all other visual input. What we now see is compared to that first look and only new data, or data that drastically alters the first survey, is actually processed. Meanwhile, all of this processing is compared against previous experiences with similar spaces and filtered accordingly. If our brains think that the space has a white tile ceiling, then we “see” a white tile ceiling, despite the fact that it is actually quite gray due to poor lighting. This is why architectural photographers use tons of fill light when shooting a space. They try to create what the brain "sees’, not what is actually physically there. This is why, in my opinion, it takes much more than a computer program to create realistic images of architectural spaces. Craig
PS to Bitterswitch: LWF is only a tool, not an end. There are many ways to create “accurate” images, so called, of architectural spaces. I personally use LWF but I also make a ton of tweaks in PhotoShop. Don’t get too caught up in the process, just enjoy the end result, however you get there.