I saw a picture in an answer to a question from 3/6/11 about installing a shower curtain with a sloped ceiling. There was a piece of "glass" installed on the sloped side (left) and a shower curtain on the right. I was wondering if it was in fact glass the was specially cut or something that you made yourself. We have this problem and are looking for a solution just like this.
Glass in a shower enclosure must be tempered to be safe. Tempered (or toughened) glass is much harder to break than conventional glass and, if broken, crumbles into pieces that are not very sharp.
Because it is so hard, tempered glass is cut to size before it is tempered (hardened). This is almost always done by a specialty glass shop. Usually they will either take your measurements or come and measure themselves, and then create the sized tempered piece.
There are also various plastics that are used in shower enclosures that are also less prone to breaking than ordinary glass. Some of these may be able to be cut by the DIYer.
In either case, you need to be sure there is a good, waterproof seal between the panel and the wall and tub.
In the answer I specifically mentioned it is corrugated translucent acrylic in a PVC c-channel trim.
These materials are almost certainly available at your local big box hardware store.
