The filtering line on the ground plane ensures that the line is not affected and the selection of the line on and off can be seen
the curve is not shown because of the automatic groundPlane
Groundplane is thought as a quick and easy helper for visualisation - less for modelling.
If you need this kind of image you can always use photoshop with 2 images - one with and one without groundplane.
with some limitations: you can
_bringToFront
the rectangle
limitation: the rectangle / curve is always drawn at front:
This is useful, thank you
