The material used for the wall is white M_Basic Wall from the standard set of materials that come with the engine and all was right (and white!) until I added the green grass material for the floor, now the walls have taken on a green colour and I can’t remedy this!
Any ideas on whats going wrong and how to rectify?
this kind of thing isnt really my forte but have you tried adding a skylight or messing with your lighting settings? that may be a good place to start trying things until someone with a better answer comes along.