SergVideo

McNistor, now I understand: it's a sausage monument!
twod, It is not in the hard edges. ndickson is right. Clearing checkbox “Add vertex normal” in Extrude node helps. Also helps Vertex node with “No Normal” before subdivision. Not very logical, it may be worth left unchecked “Add Vertex Normal” checkbox by default in Polyextrude node because people that studying modelling can fall into a stupor. But right now I do not care about it. I studying new Polyextrude. It's revolution in modelling, really!

Same question asked my wife. :wink: Nothing special. Just random sequence of polyextrudes to demonstrate a problem. But after subdivision… Now you see. But in fact I was making a spoon when faced with this problem.

Here is a bug or new feature? I made simple polygonal object with polyextrude, added Crease attribute to selected edges. Then I subdivided object. I made many times similar things in previous versions, but now (H15.0.224.16) everything begins unusually. With Flat View in viewport it's OK, but Smooth and Render views makes strange result. But not all so sad. If I remove Subdivide node and turn on Render polygons as subdivision object parameter it seems OK in Render view. What is it? New feature or new bug? If I don't use Polyextrude node, the problem does not occurs. Or if I open old version project (with old Polyextrude) - no problem. What is the reason: new Polyextrude, Subdivide node or my curve hands?