architectural visualization photorealistic render existing brutalist elevated concrete building metropolis evry courcouronnes outdoor staircase tower clad in weathering corten steel perforated panels with organic laser cut patterns warm rust orange patina semi transparent facade interior staircase fully visible from ground level rdc to upper floors critical staircase flight descending all the way down to street level ground floor with final landing at rdc open ground level access no gap between staircase and ground continuous vertical circulation from street to level 2 street level perspective blue sky natural daylight photorealistic architecture photography 8k
