Creas and Extrude.

It could be still useful in some cases, so I added an option

Yes thank you I'll have ability to experiment with this.

IStonia, I have an Idea,
Auto creasing is useful function but we do not need it everytime.
So what if you will modify Extrude and Inset streamline tools this way, if you tap Space it will automatically enable AutoCreasing? Or something like this.

Or make shortcut Enable Temporal Auto Creasing. I think modifing streamline tool will be more convenient in use.

Try this
http://www.digitalfossils.com/Download/NVil-May-05-15.rar

Create a hotkey for "Auto Subd Crease Enabled". When you extrude out the geometry and while the operation is live, hit the hotkey and your will see the changes in the geometry, provided it is in subd.

IStonia,
Nice, Can you make it work make it work once, so next time you extrude you have to run this shortcut again. Now it toggles permanently. So you will be able to turn it on/off but next time yo run Extrude you have to press this shortcut again.

Try this
http://www.digitalfossils.com/Download/NVil-May-06-15.rar

Hay IStonia, now this shortcut works everytime. Can you make it work only during extrusion or inset?

I don't know what you mean. Can you explain more?

I mean that shortcut - Auto Subd Crease Enabled, have to work this way:

 You can Enable it only when you started Extrude, i.e. only while the operation is live.


Now I can Enable/Disable - Auto Crease, wherever I want, i.e. not only when I extrude or Inset.
Try it just run NVil and press shortcut and you will see that it Enable/Disable Autocrease. But we need it only when operation like Extrude is live.

Is it possible that someone may want to enable it separately rather than in extrude/inset operation?

Yes it is possible, but what is reason, if you can use it only when extrude or inset? As my practice show you do not need it every time furthermore you will need it less then simple extrude so that is why I think It have to be like option in Extrude.
Also if it will be like it is now, you have to create new shortcut for this, but it is not so major command to have separate shortcut. But if it work only during when operation is life you can assign practically any shortcut to it.
Also new users can be confused how it works.
I think it is like option on Cut tool when you press numbers for multiple cuts. They only works during when Cut is enabled, but they do not have separate shortcuts because it is not so major operation and works only with Cut.

I think it works in that way now. Please check.

Thanks, work nice!
Have some notice in this situation Autocreas does not work:

I have this


Than extrude this:


As you can see if we have one of that edges uncreased Autocreas does not work.

Also can you make shell also work with AutoCreas?

Check the new version.