senses have been taken into consideration as this structure is coming to the. what it feels like what it smells like. how it looks, how it sounds. >> even the sound. imagine the sound when you work in a place and you hear your own steps. >> he's using natural light as a structural element in the look and feel of the building. he said the use of light is also a powerful symbol to bring hope and vitality to a place that was once covered in darkness. he showed us more in a 3-d virtual video. >> you hear, these are real studies of the movement of the sun around the building in the ribs of the building, which i think is very important. here you see the main hub. >> this is overwhelming, almost. >> look at how the roof open. it is very important to see that. in order to avoid the greenhouse effect, we have to dispose -- the whole building from one side to the other