Using a slice modifier changes the behavior of a turbosmooth?!

[notamondayfan]

Morning!

 

This had me scratching my head for a moment this morning, and was wondering if anyone can shed some light on why it might be happening.

 

Basically I have a cylinder, modified to make a curved bath leg. I then used the slice modifier to make it into a quarter (ts_01.jpg) as it's essentially a cylinder sliced twice.

However when I add a turbosmooth modifier (ts_02.jpg), I get a pinching around the 3rd loop from the bottom. I haven't adjusted any weights, or anything else.

 

If I turn off the slices, it smooths correctly as I would expect (ts_03.jpg).

 

If I then apply an edit poly, and delete the faces in the same way as the slice modifier was doing (ts_04.jpg) and then turbosmooth, the smooth is correct.

 

I have checked that the slice isn't adding any extra loops or vertices, or even welding / not welding properly, but it all looks correct. Even if I collapse the stack after using slices it still pinches.

 

Anyway, it's not a major problem now, as I can work around doing it manually, but if you're like me and like to use the stacks to keep the models as adjustable as possible, then it might be annoying on more complex models.

 

If anyone knows if I'm doing something wrong, please let me know!!

 

Thanks,

Dean

 

[Corey Beaulieu]

Slice plane have a way of re-meshing objects under the hood and from the looks of it, it must also reorder the smoothing groups.

 

That aside, you should be able to place the turbosmooth below the slice planes and get done what you want done without have to manually delete faces.

[notamondayfan]

Yea there are plenty of other ways around doing it, but it's just annoying that the slice doesn't work how I would expect it to. The problem isn't in this example as such, but could be a problem in more complex models.

 

Cheers,

Dean