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Full Version: SubD polygon to nurbs convertion issues

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From: Michael Gibson
4 Mar 2019   [#5] In reply to [#4]
Hi anto, I'd guess it's probably only an option in apps using OpenSubdiv ... ?

Do you know of any apps not using OpenSubdiv that have the option for that?

For example I don't see any such option in Silo.

- Michael
From: anto matkovic (AMM)
4 Mar 2019   [#6]
It was default for Catmull-Clark subdivs in Softimage XSI, long time before introduction of OSD. Other than that, anything Autodesk DCC, that is, Maya and 3ds Max is now OSD with sharp corners as default. So f360 is following that, probably. Blender too, while is not clear is it supposed to be default option, their betas are changing everyday.

P.S. regarding Silo, it always been popular in Maya community - I think Silo followed some older Maya methods (there were many of them, btw).
From: chrisd (CHRIS_DORDONI)
4 Mar 2019   [#7] In reply to [#5]
Fusion360 and NPower (developers of Cybor3d, Powersurfacing etc) allow for edge weighting which may not be exactly the same effect but it does give some control over the rounding effect typically seen with subdivision.

I have not played with Rhino WIP 7.0 but McNeel has been moving toward integrating subdivision modeling. Not sure if there is a function similar to edge weighting in there now though?
From: marc (MARCSAVARY)
5 Mar 2019   [#8]
Thanks everyone for the replies :D
Actually I was first surprised by F360 behavior at corners, as indeed it's not what you would expect from subdivided polys, then I found it really useful and time saving in my workflow, so I was a little disappointed to not have that in this new MOI feature. So I guess I'll have to hope the clamped down option will be implemented some day ;)
Thanks for this amazing program Michael!
From: Michael Gibson
5 Mar 2019   [#9] In reply to [#8]
Hi marc, so for the next MoI v4 beta there will be an additional option under Options > Import/Export > SubD import options > "Open boundaries: Keep corners" or "Open boundaries: Rounded".

The default will be "Keep corners" since that seems to be more common than I had thought and it also actually makes a simpler result too. But you'll be able to set it to Open boundaries: Rounded which will then give the current version behavior.

- Michael
From: marc (MARCSAVARY)
13 Mar 2019   [#10] In reply to [#9]
Hi Michael, thanks so much for this. It is really cool that you take it into consideration like that. :D
From: marc (MARCSAVARY)
15 Oct 2019   [#11] In reply to [#9]
Hi Michael, I've just installed the latest beta, and I'm really grateful you implemented the option like you said, I can now skip Fusion 360 entirely, thanks again for this ! :D

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