Thanks for comments!
Pappenheimer: there is 3 statics lights, a little bit of ambiant light and the sun light too.
Yes it's standard textures but I've made some tests with personnals textures placed in maya (uv,...) and fbx import work well in this case too.
For this level the methode is easy: all the level is made in maya, I group all and export to fbx. After I import all as mesh.

Machinery_Frank : Actually I don't have enough knowledge of 3dgs to do that, but I upload the .wmp file if you want to make some tests.

the file : http://game.irilys.eu/olivier/start.wmp