The game was designed with this appearance in mind, especially the
appearance of float glass, and having this turned off can have a
major impact on the aesthetics and even function (accessibility)
of builds.
The ability to enable/disable connected glass is of unproven value
even to lower-end systems, as most of the additional work is in
the background mesh-building thread, and by now the game is complex
enough that other factors completely overpower the impact this has
on performance.
Forcing this mitigates the risk that players who have connected
glass turned off will not experience the proper results of using
float glass, and that their builds will appear very different for
other players.
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