Chris,
Not specifically dealing with displacement , but as a general speedup
tip i have had some success doing this :
In the render settings try setting your X x Y supersampling to 10x10
and then slide your threshold down to around 5 or less and experiment
till the effect becomes disturbing .. this can really speed up a reander
and in some cases it can improve the look and remove some noise at the
same time, what you are basically doing is not rendering adjacent pixels
which are very close in colour.
Another one is that AA can be VERY intesive computationally and
sometimes if your scene requires a high AA of 3 or 4 you may find that
turning it all the way down to 1 or even off and then instead using the
post effects scaling instead can be faster.
In the case of a seven hour render, I think i would be looking at any
possibilites of breaking the render into layers and then compositing
them together after, even if this dosnt speed the render up much,
(ofcourse it may dramatically speed the render) It will mean that god
forbid if you have to make any alterations you wont have to re-render
the whole thing to change one small ellement.
If you are network rendering... dont.. :) Unfortuantely realsoft
performs better and faster if you assign a group of frames to each
machine and then save out seperate projects for eg frame
1-100,101-200,201-300 etc, varrying the number of frames according to
the relative speed of the machines.
Couple more things worth looking at that dont usually mean a big
performance increase but worth looking at:
remove any constructors.. rotate,sweep, etc and extract the gemetry from
the constructor and delete them setting the constructor to none.in the
objects spec props.
dont leave anything in edit mode
avoid making complex and deep hierachies
optimize any sds objects to as few vertices as possible, if its a flat
object with sharp corners, or in paces it dosnt show then set them to
poly mode.
use smaller texture maps if possible
Well thats about all I can think of at moment, I can really relate to
your situation, its no fun facing a deadline with render times like
that, worse comes to the worse render to a smaller rez and scale up,
youd be surprised how often they dont notice ;) .. good luck with it and
if I can think of anything else I'll let you know
happy rendering,
Andrew
Chris Sellars wrote:
Hi Vesa,
to be in the region of 7 times faster to make them commercially viable.
Obviously we will be increasing the size of our render farm as we can afford
to do so, but in the meantime we will just have to limit or exclude the use
of displacement mapping. The difference with displacement disabled compared
to the same scene with it enabled, is in the region of 25 times faster,
which I think you will agree is a huge difference.
Thanks,
Chris
Morsel Animation
----- Original Message -----
From: "Vesa Meskanen" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Friday, March 23, 2007 11:57 AM
Subject: Re: Displacement mapping render times
Hi Chris
Unless anyone can come up with a super speed up method for Displacement
mapping, or Realsoft can vastly improve its efficiency, I will have to
avoid
its use and just model displacements in my geometry where possible in
future
projects.
I expect that V6 will render complex displacement mapped scenes typically
2
times faster. Hopefully this helps.
Kind regards,
Vesa
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