Satin glass or frosted glass?

Do I need a Tektur application if I split it into three parts with a wing to open?

I think no - the rough opening remains the same. Of course, the opening wing must observe the fall height everywhere.

I would just take frosted right away and be done with it. And films are such a cheap solution. But you know that from smartphones. They peel off, have air bubbles, etc., look ugly and cause a lot of trouble if you're picky.

That is nonsense: no one pounds on the window for hours every day.

Doesn't one get a frosted window for the money (additional cost)? The film will eventually come off, won't it?

No, we had these for many years without any problems.

And foils are kind of the cheap solution.

Ever dealt with good adhesion foils? They are not much cheaper than frosted glass, but much more flexible. And since they are only attached with a bit of water, they can be used any number of times or corrections can be made if they were applied crookedly or if there’s still a bubble inside.

Even better are slides with microchannels like in cars. These are bonded dry. We have done this now.

If it fits financially, consider dealing with liquid crystal glass.