like pradipta said: thanks for the advice branko.
yes, it's maxwell, as my knowledge of 3dsmax is very limited and i cant get vray to work.
thanks very much on the tip on lightning. it is true, now i just paste some textures on it without trying to make the best of the lightning. (maybe because multi-light is so slow in MW)
thanks for the link to the architects, their oeuvre looks very nice.
shame they work in dusseldorf and not stuttgart