Until now I thought, that wireframe view in object mode draws the outlines/outer edges of every object but no edges, that lie within a plane. In short: It draws only when geometrical changes have to be visualised.
Today I modelled a plane and subdivided it. I then deleted a couple of faces and inserted circles and then connected all vertices back to faces. Everything still lies on the same plane. (I checked that by selecting all vertices and aligning them to the cursor in one axis.)
When I enter object mode and wireframe some of the circles and some connecting edges within the plane are drawn, but not all of them. Can anyone explain to me if there is any rule behind this?
(I actually wanted to use the wireframe in object mode to see if my plane is still perfectly flat, which I thought would result in nothing in between the 4 outer edges. So now I keep on thinking that something is wrong with my mesh, but I couldn’t spot any mistake. No double faces or anything.)