Max 2012 was when they(Adesk) started to first implement Nitrous viewport. My guess is that your invisible edges(dashed) are simply not showing up on account of a 2012 display issue. As for what I'm describing, a plane isn't a good example as it has no silhouette. You only need to worry about shading errors after you have…
Perfect example! That video explains exactly what I described above......but with pictures. :) Mesh/turbosmooth is another matter entirely. That is subdivisional modeling as opposed to polygonal modeling (what we'very been talking about) I highly recommend watching all the vids on that site as it breaks the fundamentals…