I would like to know how to draw the discontinuities of a piecewise function, but using the addplot3 (that is, surface). For instance, consider the example here, you can see that the discontinuities are drawn using filled/empty circles. However, in my case, I would like to make an "empty wall" in a 3d graph in order to show such discontinuity. How can I do this?
In the figure below is my plotting, where the wall (you can see the wall from the rectangle at the top to the pyramid starting at z = 0.5) is currently being drawing.
