Referring to some figures having a single plane for transmapped per upper/lower lash geometry (eg Antonia) and others having 2 planes layered for said geometry (V4, La Femme)...

I personally haven't seen a significant difference but am curious if Poser users have a preference one way or the other. I imagine that doubled layered has more morphing options, such as thickness or irregularity, but wonder how many actually take advantage of such a thing outside of lash length in terms of spinning dials. Seems to be density can easily be handled by the maps.