How should I attach glass panes for use as shower walls in place of tile?

I want to build an all glass shower, including glass panel back walls (see picture at top of page here: http://grayglassblog.com/backpainted-glass-shower-walls/) I am having great difficulty finding how they should be attached to the wall and what material should be behind them.

For example, should drywall vs. concrete board behind? Should they attach simply with silicone or would thin-set mortar provide better adhesion? I tend to doubt mortar, as glass is flat and does not have the ridges like the back of tile does.

The closest I've come to an answer is how this is used in kitchen back-splashes, where they say having j-channel around the outside and some silicone on the back, spaced in circles is more than adequate. This seems to also be the case with thick plastic shower panels, just not sure if the same silicone 'circles' technique will be effective.

It sounds like I want 'colored' not 'painted' glass in this case.

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    Be sure to use tempered glass, whatever you do. I'm not sure if it's required by code, but it's a good idea, particularly in a slippery shower. – user3757614 May 9 '19 at 6:05
  • 100 % agree with user3757614 was going to leave the same comment +. You might want to bead blast or chemically etch the back side of the glass so it looks better. Read the link and it is painted glass. But did not see if tempered. – Ed Beal May 9 '19 at 14:06
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    Any kind of adhesive is only going to stick to the paint, so it will only be as strong as the paint's adhesion to the glass, which is not going to be that great. The edge rails will have to hold it completely with maybe some dollops of silicone as more of a shock absorber than an adhesive. And yes, tempered glass is a must if you use glass at all. One slip and you could end up sliced to pieces... – JRaef May 10 '19 at 1:24

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