Slightly strange assumption to directly go to something being a VE item because it differs from a render. Renders are only visuals to help understand the project, they are not meant to 100% show the final product.
Residential buildings need operable windows, of which the renders did not show, adding the operable portions of window to the actual product and not the render doesn’t make the “extra” mullions a VE item. The inclusion of the operable windows would’ve already been apart of the bid documents, you wouldn’t add them after because then that would be an added cost, which is the opposite of what VE is for.
Looking at this photo posted above: the curved windows were the ‘master stroke’ on this design.
The curves on windows - or any part of the new building - add much visual appeal.
The ‘master stroke’ here is the designers answer to an age-old riddle: “how do you square a circle?”
On the outside you see those lovely curves; on the inside there is a standard square window frame: they ‘squared’ all the curves.
This is a master-stroke because finding options for window blinds for curved, or arched windows is quite limited; as compared to typical square/rectangular windows.
The designers of this building found the perfect balance between Beauty and Functionality - Master Stroke.