no ligtheffect to Mesh

Hi,
my problem is to make (for example) walls in a Room in 3ds, then i place a light outside the room in the north, but all the walls has one Color. There is no effect in the Room. the Wall in opposite side of the light has the same color like any other. Sorry for my bad english :o)

Humm...

If you're referring to DirectX lights, you need to understand that they work by illuminating polygons where all three vertices of that polygon are contained within a light's radius.

It could be that you need to increase or reduce the LightRange of the light you created to get the right effect.

Alternatively, look at Quill3D. It does lightmapping and exports to B3D format. Might suit your requirements better?