ZBrushCentral

Mirror Geometry

The resulting 3d mesh does not contain any polygons. What does that mean when I’m trying to mirror geometry something?

Also, how do I tell where the lines of reflection are?

look in the preview window is your model to far to the right of the center cursor ? on the left doesnt matter - on the right should be at least touching the cursor - dont fully understand second question - Zbrush currently is not a true raytracer app
so no real reflections