[Bf-committers] Qdune code
j.merritt at pgrad.unimelb.edu.au
Thu Nov 8 01:16:43 CET 2007
Good grief Campbell, that's a very glib statement!
Firstly, you don't say which version of Aqsis you tested, on what
platform, how it was optimised, etc. Considering qdune has never seen
a release, to have Aqsis fairly represented would presumably have
involved getting a current SVN build going...? Aqsis SVN is faster
than the previous 1.2.0 release from Feb 2007.
Secondly, of all the Aqsis geometric primitives, I would say that
subdiv surfaces are among the *least* well-supported! They're there,
and they work, but they aren't anywhere near as fast as NURBS for
example. As with everything else, they are in development, and I'm
sure that if Blender were to become a major provider of subdiv content
then improving them would shoot way up the list of priorities.
Thirdly, how were your simple subsurf tests performed? I'm guessing
you just chucked the same RIB file at both renderers right? Did
anyone count how many gprim splits were done or how many micropolygons
were produced? I ask mainly because the basic "quality" settings of
renderers can be different. Pixie vs Aqsis is a great example...
Pixie seems to end up with more coarse surface approximations, and
hence renders "faster". It doesn't mean that Pixie *is* faster (I
would argue the reverse)... just that it's not as high quality by
default, doesn't have to do as much dicing and splitting, and then has
nowhere near as many micropolygons to shade and sample. (The idea is
that whoever produces the scene can change these settings in the great
Finally, one of the best things about Aqsis is its test suite. The
tests are *not* specific to Aqsis and are more extensive than any
other RenderMan test suite I'm aware of. Can somebody please post the
results of running qdune on these tests? Then we'll know whether it's
something to get excited about, or whether it's still a naiive
implementation with a great deal of work still to be done.
On 08/11/2007, at 8:44 AM, Campbell Barton wrote:
> Aqsis was slower then qdune for simple subsurf tests,
> This is a fair comparison, qdune and aqsis both support this well.
> Pixie wont run on 64bit systems yet.
> Even if they were used, integration would still take a while.
> On Wed, 2007-11-07 at 16:35 -0500, David Bryant wrote:
>> Maybe I'm taking a shot in the dark but,have you examined Aqsis'
>> source code? It's rederman compliant.
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