Try to detect player traces going through a change in fluid medium
such as water/air or water/glass, and block facial recognition
through it.
Specifically allow air-into-glass transitions, or into any other
medium otherwise clear enough to allow sunlight to propagate.
- Super-clear, ultimate form of clear glass.
- Needs to be molded floating atop lava.
- Not sure about merging this yet; there are kinda a lot of forms
of glass already now...
This makes glassmaking more challenging, as glass that is quenched
when not molded, or left wandering too long, will tend to quench to
crude glass, which is inferior.
This also prevents molten glass from wandering the countryside
forever from failed glassmaking attempts, and precludes keeping
molten glass in "captivity" as a crude infinite light source.
