That's super amazing. I wasn't aware that the initial selection can play a role even when you select all afterwards! Using sSplit and subdiv gives very interesting results and you stay within MoI to experiment and cut. I learn a lot by your mini tuts! <3

Of course subdivision can work on 2D !
In this case disable Preserve Corners if you select a simple square for example!





After you must make some little tricks if you want use only the subdivided curve(s) resulting!

A funny one is to use the Hide function associate to the nature of the Preselection of Moi!



Join curves at the end of selection ! Here a general fillet or anything you want at the end...

You can also use the Function Edit "Add Point" so very flexible!



Iso Curves + General Trim will give another result !Less Flexible!

Where can I get the subdivide script?

http://moi.maxsm.net/media/files/
All the plugins of Max Smirnov!
Subdiv 9
SBridge
Ssplit
Sscale

If you want them in French : http://moiscript.weebly.com
Les Commandes / Section Scripts de Max Smirnov ;)

We can't have edit subdive on 2 "half parts" in the same time!

So Subdivide on an half part mirror it and make any thing you want on the original half Part!

It's a little tricky !
- Mirror Original
- Select Mirrored
- Call History - Enable History - Deselect
- Select Original
- Modify / Edit as you want --> that is refflected! ( subdivide is not reflected)
(you can subdivide at any time the Original for test the form)
- Re-group the 2 parts
-Join
You can Subdivide the all volume!



Remark that the start lateral general side is "Open" !

Extrude on middle faces is possible but not on the extremities!
Because faces are not all subdivided!

So Copy Move 1 faces & Bridge it on the faces's extremities!

For past something you must use Copy Snap then Join!
So kill the 2 minimum faces of "collage" from the 2 volumes!

Boolean Union don't work because some faces'edges ...
...will be welded in external "walls"and so create un-subdivided faces!

With the last function Sscale seems we can make some many things ;)
That's a very funny method of modelisation! Thx again to Max Smirnov for its crazzy plugin!



If i have forgotten something don't hesitate!
The only default of this method is that result is like a random result about measures...
so some tests...takebacks...it's an artistic method! :)

The abstract art exhibition.

(Combined with serious modeling tool knowledge injections)

:) ....maybe abstract but 3D Printable! ;)

Careful!
Extrude don't make suddivisable objects in some cases!

Use Bridge between 2 faces! (Bridge on the Left, Extrude on the Right)

So the trick is to split the 2 faces before! ;) (like for a Bridge)

Select a Face Select All Psplit
Select each face
Extrude
Subdivide

If a shell had no problem you can make multiple Subdivisions for refine the volume!

For "crease" a face with the classic "Polygonal" method...



else playing with the Sscale...