What the freak are these "tails"??

I’ve seen these “tails” on objects in several tutorials:

http://download.blender.org/documentation/htmlI/PartM/mesh_modeling_B/gfx/SubSurf01.png

What are they and why can I not see them on any of my models?

I’ve not read any description of them.

Just curious, still learning. :slight_smile:

oops! I didn’t know the image was all one piece! Well, what I’m asking about is in the fourth row of images…

That’s the optimal subsurf view… but, IIRC, an older version. The latest version of blender maps the vertices right to the model when you turn on Optimal.