etherial? I'm just guessing here, but you might be referring to 'volume' presets. They're handy for clouds, smoke, exhaust, anything wispy. Just create a primitive, and use a volume mat. I've downloaded about 2/3rds of Lunariad's stuff..she makes great mats.

I wish I'd said that.. The Staircase Wit

anahl nathrak uth vas betude doth yel dyenvey..;)