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OpenSubDiv Testing and Discussion Thread
Posted: 25 April 2013 03:04 PM   [ Ignore ]   [ # 46 ]
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niccipb - 25 April 2013 02:52 PM

What has me curious about using Ptex in DS is if it is only going to be a rendertime feature, or will we get to have the benefits of the viewport GPU acceleration for realtime viewing of displacement….

nicci… smile

Oh, the Displacement Viewing is PTex???  Okay, thought it was OSD…

Ken, I’ll get to that video later, I’m busy learning MAYA today smile

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Posted: 25 April 2013 03:29 PM   [ Ignore ]   [ # 47 ]
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Hi…

wancow - 25 April 2013 03:04 PM
niccipb - 25 April 2013 02:52 PM

What has me curious about using Ptex in DS is if it is only going to be a rendertime feature, or will we get to have the benefits of the viewport GPU acceleration for realtime viewing of displacement….

nicci… smile

Oh, the Displacement Viewing is PTex???  Okay, thought it was OSD…

Ken, I’ll get to that video later, I’m busy learning MAYA today smile

I think it is both actually…. Ptex provides the high detailed seamless image information (color, displacement) and OSD provides the sub-divided mesh and the GPU acceleration…

That’s at least what I have gathered so far… I could be mistaken on the details though…. this is all new territory here in DAZland… wink

But since DS has both being integrated, it would only seem natural to have that functionality at some point…

nicci… smile

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Posted: 25 April 2013 03:37 PM   [ Ignore ]   [ # 48 ]
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niccipb - 25 April 2013 03:29 PM

this is all new territory here in DAZland… wink

Can you spell: “Understatement?”

But since DS has both being integrated, it would only seem natural to have that functionality at some point…

nicci… smile

Sure hope that’s true! 

Made the mistake of telling a couple of Poser users that Poser will be obsolete till it gets some kind of Subdiv, and OSD would be the best way for it to get that, boy I might as well have murdered their first child…

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Posted: 25 April 2013 10:13 PM   [ Ignore ]   [ # 49 ]
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Got this note from Neil Blevins, red text is what I wrote him:

Neil, I may have failed to mention that the DAZ implentation is still in Alpha stage.  For now, we only have the ability to change one edge or vert at a time, which is severely limiting.  I’m hoping we get to be able to select mutiple edges.

Yes, that is indeed incredibly limiting. But it is alpha, so understandable.


You are correct about integers.  That’s what we’re currently limited to. If you’re interested in seeing it: this is the thread where we’ve been discussing what we’re seeing in it… needless to say, I’ve been corrected more than once.

Quite a spirited thread, glad to see all the interest.

One more note, I also have some articles on ptex if you’re interested in reading:

http://www.neilblevins.com/cg_education/ptex/ptex.htm
http://www.neilblevins.com/cg_education/ptex_mudbox/ptex_mudbox.htm

I don’t know a lot about licensing, but yes, ptex is disney feature animation, and Opensubdiv is Pixar, we are related (and we use ptex here at Pixar), but we are run as separate groups.

- Neil

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Posted: 25 April 2013 11:47 PM   [ Ignore ]   [ # 50 ]
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Hi wancow…

That’s great that you have been able to have a dialog with Neil Blevins and the extra info that he has shared… He even took the time to read the thread… cheese

BTW… you do know that you can change the weights on several verts and edges at the same time… wink

nicci… smile

edit: spelling

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Posted: 26 April 2013 08:23 AM   [ Ignore ]   [ # 51 ]
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noooo… I did not know that!  How you do thaat????

Neil has been amazing.  It seems to me this is something he genuinely believes in.  I didn’t realize he still works for Pixar, and I’ve been taking his precious time up smile  Which reminds me, I need to thank him for that email…

Just (legally) got a free licence for Maya 2014… and I need to dive into modelling, so I may be away for a few days, or I may pop in and out, but I’m trying to learn the modeller and that’s going to demand a lot of my time.

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Posted: 26 April 2013 01:35 PM   [ Ignore ]   [ # 52 ]
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Hi…

wancow - 26 April 2013 08:23 AM

noooo… I did not know that!  How you do thaat????

I’m was kind of surprised you didn’t know… just select all of the polys that you want to influence, they should then be listed in the Tools pane…. then in the Tools pane just group select all of the edge pairs and/or vertices you want to assign a weight to (use Shift or Ctrl) they should all show the dots in the viewport…. then Right-click on any part of the high-lighted selection in the Tools pane and you should see a context menu pop up with two options… I forget at the moment what they are called, but I believe the first one will give you a new window to input a weight value for the selected verts….

Just (legally) got a free licence for Maya 2014… and I need to dive into modelling, so I may be away for a few days, or I may pop in and out, but I’m trying to learn the modeller and that’s going to demand a lot of my time.

How lucky are you… cheese  have fun… I’m sure you will…

nicci… smile

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Posted: 18 May 2014 12:53 PM   [ Ignore ]   [ # 53 ]
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wancow - 25 April 2013 10:13 PM

Got this note from Neil Blevins, red text is what I wrote him:

Neil, I may have failed to mention that the DAZ implentation is still in Alpha stage.  For now, we only have the ability to change one edge or vert at a time, which is severely limiting.  I’m hoping we get to be able to select mutiple edges.

Yes, that is indeed incredibly limiting. But it is alpha, so understandable.


You are correct about integers.  That’s what we’re currently limited to. If you’re interested in seeing it: this is the thread where we’ve been discussing what we’re seeing in it… needless to say, I’ve been corrected more than once.

Quite a spirited thread, glad to see all the interest.

One more note, I also have some articles on ptex if you’re interested in reading:

http://www.neilblevins.com/cg_education/ptex/ptex.htm
http://www.neilblevins.com/cg_education/ptex_mudbox/ptex_mudbox.htm

I don’t know a lot about licensing, but yes, ptex is disney feature animation, and Opensubdiv is Pixar, we are related (and we use ptex here at Pixar), but we are run as separate groups.

- Neil

For those that previously mentioned that Blender would need to be in their DAZ OpenSubDiv workflow…

Ton tweeted that Blender is getting OpenSubDiv this summer.

https://twitter.com/tonroosendaal/status/465925083572494336

It seems to be in the very early stages and there are a lot of challenges to overcome!

http://code.blender.org/index.php/2014/05/opensubdiv-gpu-tessellation-wip/

https://www.youtube.com/watch?v=dzIl_S-qHIQ&

http://blenderartists.org/forum/showthread.php?331486-OpenSubDiv-Can-we-have-this-please-(video-in-post)/page4

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