These small pinholes would then be patched smooth and flush with dabs of clear epoxy, which would still let some light through.
Somewhere in this forum is a thread where I posted an "artist's conception" of a more advanced version of this. The idea was to make larger holes and fill them with translucent epoxy, not just pinholes. I don't think anyone ever tried it.

Unfortunately, I can't seem to locate the thread where I posted that picture. Anyone else got a link?
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Tony Fabris