I was going to let it go but here we are again.

You're not right - total internal reflection is called total because it is literally 100%. It is not a theoretical phenomenon, but a real one, demanded by physics. It isn't just for idealized surfaces, but any surface where the transition is from higher to lower index of refrection (i.e. speed of light).

I gave links - you could read them and respond with the actual words to show that you know what we're talking about.

But more than that - your problems with the glass shader are unknown to us because all the words you've used are just describing how glass works.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)