Support for quad/rect 2D shape in 3D (or degenerate cuboid)?

Hi,

Is it possible to use a degenerate cuboid shape in 3D to simulate a quad/rect 2D shape? That is, setting one half-extent to `0.`? By "possible" I mean both whether this works in the first place, and whether this is optimal performance-wise, so handled as a single face instead of a 6-face cube?

Otherwise, what option is there for a quad/rect 2D shape in 3D? I'm surprised this is not supported as built-in given the wide variety of shapes already supported, did I miss something? Should I use a triangle mesh? That feels a bit sub-optimal.

Thanks! :)