Lighting Issue

Here is a before and after link to a set of images. I am not using a lightmap here this is just a diffuse and normal.

https://drive.google/folderview?id=0B8QZNmu75MXKbk5pZ3FuUnFFT2M&usp=sharing

In 3DS it looks like the Before image when rendered, I have created a LightMap in 3DS with the Mental Ray Render and positioned the sun in almost the exact place where I want it to be in this environment.

I could do with some help neither fixing the images or turning shadows off completely and using my light maps. Even the preview light map is better than the one after, i would be happy to keep that

Thanks for your help by the way, I am rubbish at typing without coming across as bossy, straight to the point lol