defense-92.fr got more news and a couple of additional, more accurate renderings that are welcome.
The full office tower (38 floors, roughly 150 m / 450 ft tall) should sit in the place of a 14-storey building built only 20 years ago and already to be demolished, as I mentioned in post #1, and reinforce the monumental canyon effect rising along the northern section of the ring boulevard. It's all (existing building + project) owned by Swiss bank UBS that claims they don't want to get in any height competition, thus the rather humble height of their project.
My main concern is not height anyway. It certainly will be tall enough nearby slightly taller First and CB21 to induce a satisfying canyon section.
It's all about the facade. We've got these too large, HD renderings:
http://www.defense-92.fr/photos/alto-1.jpg
http://www.defense-92.fr/photos/alto-3.jpg
It's double-skinned. As far as the visible materials go, the 1st layer seems glass and aluminium, the 2nd full glass arranged in a fish scale fashion. It eventually looks more interesting on these better renderings.
There's also that
20-floor hotel currently
under construction that you can see across the boulevard on those renders.
Something is yet missing, while so badly needed by the district. Housing within the tower and retail at its foot. It's a nonsense in that area when the Hermitage twins are likelier and likelier in the very close surroundings.
Completion is expected by the end of 2017. It doesn't seem to cause any particular problem so far.