Connection of bathtub to shower

at 120cm you don’t necessarily need a glass wall on the bathroom side, so it’s open to the front. I have it like this and it works perfectly, and when you enter the bathroom with the wall folded to the side, you have a clear view into the bathroom, the room feels bigger. With the room size, no dark tiles!

You mean a walk-in shower? 120 cm is definitely way too little for something like that - the water will splash out on you quite a bit.

I think there is some confusion here about how the shower is set up :D The long side should be the open one, so that you only have 90 cm of "shower space".