Vray Interior Lighting Problem

[smithy_gas]

I am currently doing an interior day time image from a small project I am working on.

 

I am having problems getting the daylighting correct. I have a vray light plane in the main large window which when enabled emits enough light to light the roof effectively. I have tried a direct target light and a vray sun light to try and immerse the room with sunlight and neither are currently entering the room and creating the shadows I would expect them to do from previous scenes!

 

See attached examples of what I mean. It is most probably something simple and idiotic I have forgetten but my brain is strained trying to work it out... any suggestions?

 

The first image is with the vray plane off and a vray sunlight

 

The second image is with the vray plane on and a target direct light on. Light enters this one but not in a realistic way and more like a spotlight.

 

Thanks.

 

 

[smithy_gas]

Scrap that... got it. One tick box was all it was!