I wonder if the 14 graphics engine can do something like this.

[Niwashi]

... and if the ratings boards of any countries would have issues with it.

So long as it's not making the outfit any more risque than lots of other gear already in the game (so apparently fine with all the necessary ratings boards) that's not really an issue to even consider.

The solid non-sheer fabrics in the requested outfit already provide as much coverage as a lot of our current gear does. Adding some sheer fabric to other areas that frequently aren't covered at all doesn't change that. Clearly none of the ratings boards in areas where SE sells this game have any issues with bare legs, or a lot of our other gear wouldn't exist. If you can have bare legs, then you can have legs covered only with sheer fabric.