ᐅ Corner glazing with a steel support column for roller shutters or blinds?

Hello,

we initially planned a house type (urban villa).

The floor-to-ceiling corner glazing on the ground floor and also on the upper floor should really stand out, so the only solution is a steel support column in the corner (as shown in the picture) – a masonry corner would be 36x36cm (14x14 inches) again and therefore too wide (the windows would no longer appear as one unit, but as separate windows...).

However, the big problem now is how to install the shutters/blinds on this corner glazing. Several companies and also the architect confirmed to us that this is not possible as planned.

There are 4 options:
1) For built-in roller shutters (roller shutter box integrated and load-bearing in the lintel), there is too little support surface, so this option is ruled out.
2) Using surface-mounted roller shutters, which are installed on the outside of the wall. This would work, but the shutter boxes would look like add-ons and do not really fit an urban villa style.
3) Venetian blinds or surface-mounted roller shutters: These are placed in front of the window and finished flush with the masonry using a plaster carrier (for surface-mounted roller shutters) or cladding (for Venetian blinds). However, it is necessary for these windows to be set deeper in the wall. Normally, windows are recessed about 12cm (5 inches), but with these shutters or Venetian blinds, the windows would need to be recessed about 18cm (7 inches) so that the shutter boxes are hidden and no longer visible from the outside...
4) No external shading/darkening – instead, Venetian blinds inside, etc.

For us, only options 3 or 4 really remain, but on the one hand, we are wondering if it would still look good with the glass front (south side) (see picture) – with so much glass – having the windows recessed 18cm (7 inches), while all other windows on the house are only recessed 12cm (5 inches) (without shutters)?

With option 4, using internal Venetian blinds/shutters, we just doubt whether they would provide proper darkening at all?!

Do you have any ideas / what looks best or might be the best solution for this corner glazing?

Best regards,
Tim