[Bf-cycles] OpenSubdiv article
matt.heimlich at gmail.com
Wed Sep 25 01:04:05 CEST 2013
The base meshes aren't any heavier in Arnold's approach as far as I
know, they just have more polygons at render time because they do
all-over subdivision rather than the selective division of Pixar's
REYES approach. One isn't any "better" than the other, it's just that
a monte carlo path tracer won't experience much of a performance hit
when rendering more polygons, while REYES render times are much more
dependent on polygon count. Arnold doesn't take the approach of fancy
ways of finding the limit surface of an object because for them it
doesn't matter if you have 100 million or 200 million polygons. Both,
in essence, still use the same subdivided base mesh/displacement map
method at their core though. You don't have to model in any special
way for either one.
On Tue, Sep 24, 2013 at 4:02 PM, Marco G <digitalbath86 at hotmail.com> wrote:
> Yes indeed would be great if sorted out sooner or later and widely adopted
> by "everyone"...thinking about this, the last Siggraph notes by Brecht,
> the google projects going to be finished or developed further (mostly
> depsgraph, viewport fx, multithreaded DG), and 2.7 series coming,
> i was wondering what are developers thoughts about which workflow might be
> pushed more for Blender in the near future.
> the Pixar one with lower base mesh / OpenSubD / displacement with Ptex etc
> or the "Arnold" one, with much more heavy base meshes...
> ...any more recent thoughts?
> Thanks, MG.
>> Date: Tue, 24 Sep 2013 15:07:07 -0400
>> From: matt.heimlich at gmail.com
>> To: bf-cycles at blender.org
>> Subject: Re: [Bf-cycles] OpenSubdiv article
>> Not the first time I've heard that Solid Angle's implementation is
>> faster on the CPU. Hopefully that gets sorted out soon, as a standard
>> would do the industry a world of good.
>> On Tue, Sep 24, 2013 at 1:46 PM, Marco G <digitalbath86 at hotmail.com>
>> > Hi all,
>> > sharing a nice article about OpenSubdiv on fxguide for those who missed
>> > it.
>> > It does also mention why SPI nor SolidAngle is not yet implementing the
>> > library, mostly because of bad optimization of the CPU code, something
>> > Pixar
>> > should address in 2014.
>> > Cheers all, MG - link
>> > http://www.fxguide.com/featured/pixars-opensubdiv-v2-a-detailed-look/
>> > _______________________________________________
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>> > Bf-cycles at blender.org
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