How to best blind a thick drain pipe? Any suggestions?

I was only interested in this in connection with indirect lighting for the living room.

Just search the internet for the keywords stucco and indirect lighting.
I am not allowed to provide links.

Just put in a transparent tube. That way you save money on the cladding and any lights and get the ultimate A-ha effect!

I didn’t think ypg’s proposal was that bad.
You could represent the pipe’s course with the paint as if it were exactly as desired there.
The stucco option would of course also work – but I find it a bit odd if the stucco is only present in the G-WC and not in the rest of the house.
On the other hand, I have to admit – my wife is/is going to be responsible for the nice things. I will probably only be allowed to give my approval. The only veto right I have left is if it gets too expensive.

Is it possible to make a "masonry" shelf at that spot? We have at one spot instead of a boxed-in section where a pipe goes down from the [DG] to the [EG], simply a "huge" box made of plasterboard with recesses. It looks intentional!

Is it possible to make a "masonry" shelf at that spot? We have at one place instead of a soffit where a pipe goes from the attic down to the ground floor simply a "huge" box made of plasterboard with recesses. It looks intentional!

Mmh, I think it's too high for that. There's not much space in the guest WC anyway, and it's also an exterior wall.

What is under the pipe? Toilet? Sink? Nothing?

I assume, since it is an exterior wall, probably nothing underneath.
The layout of the guest bathroom will no longer be changeable. The ceiling was already there.
So you will have to come to terms with a boxing-in in one form or another.

If that is an exterior wall, then the boxing-in at that spot is already just above the window anyway. So why the objection to fully suspending the ceiling?

Alternatively, I can think of, for example:
- Not fully suspending the ceiling but rather curved, semi-circular, or triangular and equip this with ceiling spots
- Adding a boxing-in on the other side as well and illuminating both. That way it looks at least balanced.
- Or connecting the two boxing-ins with frosted glass and light behind it. That way you do have a suspended ceiling, but it might feel somewhat more open because of the glass