When using turbosmooth with isoline display enabled then collapsing to either an editable poly or mesh, I’m getting some strange behavior which may or may not be a bug because I’ve tested it in Max 2009 & 2010.

If you take your object with the turbosmooth and convert or collapse it to an editable mesh, it looks right, but it only creates polygon edges where the isoline display was. The selection in the screenshot on the left is one polygon made up of 128 faces.

If you convert your object to an editable poly, it only creates the vertices where the isoline display was. When using meshsmooth with isoline display and collapsing to either editable poly or mesh, it works as expected. I put together a screenshot to illustrate my point.

Is turbosmooth supposed to act this way?

3ds Max 2009 SP1, 2010 SP1
Maya 2012
Windows 7 Professional 64-bit
Dual Intel Xeon E5520, 6 GB Ram
NVIDIA GeForce GTX 460 OC

	Attachment

Just tried it and can confirm this behaviour in Max 2010 x64.
I would say it was a bug, Isoline Display is just that, a “Display” mode, it should not affect the geometry. The effect of turn to mesh is more acceptable, but the turn to poly is clearly wrong.

Thanks for the confirmation. It’s weird that turbosmooth changes the geometry but meshsmooth doesn’t..

3ds Max 2009 SP1, 2010 SP1
Maya 2012
Windows 7 Professional 64-bit
Dual Intel Xeon E5520, 6 GB Ram
NVIDIA GeForce GTX 460 OC

Is looking more like a bug as “done like this by design”.
Actually in the NURMS subdivision all happens at a sub – object level of
A mesh definition; by “Turbo-Smooth” it is a display mode of a modifier
Anyway if one doesn’t use Edit Poly or Editable Poly, but Normal modifier things are as expected. (see attachments)

ivan

	Attachment

	Attachment