The following is an example from ParametricRegion help. It works fine.
region = ParametricRegion[{Cos[\[Theta]], Sin[\[Theta]]}, {{\[Theta], 0, 2 \[Pi]}}]
RegionPlot[region]
Here is a similar example in 3D. I expect to get a part of a helix but only obtain an empty bounding box.
region = ParametricRegion[{Cos[\[Theta]], Sin[\[Theta]], \[Theta]}, {{\[Theta], 0, 2 \[Pi]}}]
RegionPlot3D[region, Axes -> True]
Am I doing something incorrectly?
