AccuRender nXt

For some good examples of indirect lighting, see the IRender nXt Gallery : For instance this interior: Some shadows are stark - such as the beside lamps, but some lighting is very subtle - such as the lighting near the ceiling. This is the effect of indirect lighting. Here is a rendering of a room from...

How can I make the NXT demo soften and lighten the shadows? I used the light shadows, and default lights, and ambient light from 50% to 800%? See the thread: http://nxt.accurender.com/forums/p/763/3150.aspx#3150 Try setting sun and sky intentisy, and cloudiness