The director for the current show I'm working on wants a clear material we can use to cover window frames, to create the appearance of glass. She wants to know if there any completely clear gels. We have a swatchbook of Roscolux gels, but the clear filters in it all have a..."fuzzy" appearance from far away, which we don't want. Anyone know if there is an absolutely clear gel that would fit my director's desires? As a note, we considered using mylar, but that runs pretty expensive, which is why the director wants to try using gels.