Hello.

I noticed that in 3ds max 2012, when i split an edge or detach a polygon the smoothing at that point changes and seam is visible. I think that in previous versions when i did the same thing the smoothing remained. Is there a way to prevent this?

Thanks in advance

The reason for this is that any place where there are split edges (where you split the edges, or all of the edges around the detached polys) there is no longer any connection between the two adjacent polygons. It’s basically like having two separate meshes next to each other, and smoothing both separately. This can be very useful sometimes, but you must be careful as well because it causes your mesh to be non-manifold.

3ds Max Design 2012/Maya 2012
Intel Core i7 3.07 GHz, 8gb RAM
AMD Radeon HD 6950
Windows 7 Home Premium SP1 x64

Thank you both for your replies.

I noticed something though.
In this tutorial http://www.youtube.com/watch?feature=player_embedded&v=HWDgjHHVOA8 the guy detaches parts of the object and the smoothing is maintained (no visible seams).
Why is this happening? if i try detaching a part of an object the seam becomes visible. What is he doing different?