Sounds nifty. Several steps though. Wonder how high FOTURAN Schott glass prices are?
How about this idea:
Use one of your local cheap/open hardware XYZ gantry bots to hold a small CO2
laser and optics. Have some inexpensive optically flat glass on a bed in a tank
with some NaOH for etchant flooded over the glass surface at T - .5 seconds
or some time that works empirically to have a film of X thickness of etchant
on the glass. Write patterns in the caustic on glass by way of the heat of the laser
accelerating usual NaOH etching, and probably having some blast/ablate effect because
of temperature differentials.
Might get low cost channels cut. Sounds like fun experimenting. Need to get my
XYZ gantry bots built... Might infringe a stratasys patent depending on their claims.