They make all kinds of window films, frosted, privacy, patters but they are installed inside and being in a humid environment it may not last!

I would be looking at some type of storm window to install outside with an additional layer of frosted/textured glass.

 

That is called obscure glass, probably Cardinal P516, which is the most common. Anything that let's light through will allow someone on the outside to see a vague form inside, so the answer to your question probably depends on your opinion of what is sufficient.

Marq may be on the right track with a 2nd layer of glass. I would probably suggest you have something inside, however. If you go to a glass shop they can show you a range of obscure glass options (rain glass or hammered glass or even leaded glass might be good options) that they could grind / round the edge on or put into a frame (just like leaded glass usually is) and then you could hang it in front your existing window casing or mount it directly on the trim (or tile) with spring loaded mirror clips. A 2nd type of glass would diffuse the shape of the person inside, making it fuzzier. But nothing other than paint on the window will make you invisible.

The best type of window trim for your remodel will be tile. Wood has no place in a shower.

 

Hang a translucent shower curtain in front of the window. It will also slow the rot of any wood trim.

 

Replace it with a vinyl or vinyl clad window unit.

 

That *is* a vinyl window. He's asking about the trim.

 

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FWIW...many years ago I used a frosted film on the inside glass and it lasted many years. The humid conditions did not affect it. However, it did shrink around the edges after several years. I don't recommend it, but it is a very inexpensive solution. To be honest, Ray's suggestion to use a curtain is your best and cheapest solution until you do your remodel.

I'm faced with a similar situation with shower bath window facing the street. Wife wants to extend shower stall to meet at the window edge. It will in fact slightly protrude into shower. Can't convince her it can't be done.

 

Old original glass block window near shower with tile returns and "trim".

 

How about planting a nice large evergreen shrub in front of the window?

 

That assumes it's on the first floor. Might be the second floor and if they live in a big city, houses are next to each other, so privacy still needed.
Even so, it takes a long time for an evergreen to grow tall enough.

 

This is similar to what I have:



Simple, and inexpensive if someone in the family has a sewing machine and knows how to use it. Uses simple & cheap lockseam rods that attach to the window itself. The curtain is a single piece of material with a pocket/tunnel sewn at either end that the rod runs through. For extra style points, make it overly wide so the material bunches up and hangs in pleats. The flourish at the top of the window is optional.

There also are shutters made to mount on the inside of the window that only cover the bottom half. Some are hinged and have a locking latch in the middle so the shutters can be opened and thrown back to clean or open the window.

 

I think the window is actually inside the shower, not just the bathroom and there doesn’t appear to be any room to inside mount, if I’m seeing right.

 

I've painted bath rms that had picture windows in the shower, a few even had a sliding glass door. That's fine if the house is in a location that prevents outsiders from viewing inside. One builder always put a fence/garden around that window/door but as mentioned above that didn't work well if a 2 story house was built next door.

IMO those window 'sticker' film is the best short term fix.

 

Why not just a set of Venetian blinds? That's currently what we're using. Make sure their room darkening, and vinyl. You won't find any with cords anymore. All are push/pull from the bottom.