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le13emepanda
PostPosted: Thu Apr 05, 2012 12:23 pm 

Joined: Mon Sep 12, 2011 12:42 pm
Posts: 20
Hi all
I've noticed a weird thing
An image rendered with 4 nodes has more noise than a one rendered with a single node
Of course, all nodes have the same configuration and the SL reached is the same
Is it a known issue ?
The model is lightened with a HDRI HQ and emitter and IES, and the difference between the two renderings seems to disapear if i use Maxwell environnement settings instead of the HDRI.
Have you experienced the same issue ?

Sur 1 node :

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Sur 4 nodes :

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A+

Le 13ème panda
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Bubbaloo
PostPosted: Thu Apr 05, 2012 9:03 pm 
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Joined: Sat Feb 24, 2007 11:50 pm
Posts: 7338
Location: Tulsa, Oklahoma
I think it is noise introduced from the merging process. If so, I believe it's a known it's a known issue.

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Brian Looney
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numerobis
PostPosted: Thu Apr 05, 2012 10:10 pm 

Joined: Mon Apr 11, 2005 10:47 am
Posts: 1515
Location: Germany
Bubbaloo wrote:
I think it is noise introduced from the merging process. If so, I believe it's a known it's a known issue.


:shock:
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le13emepanda
PostPosted: Thu Apr 05, 2012 11:27 pm 

Joined: Mon Sep 12, 2011 12:42 pm
Posts: 20
Ok i'm agree with you Brian concerning the merging process.
but i think it's a new issue, because i don't remember it was the same before v2.6
Well, i hope NL will fix that problem soon
Thank you for your answer
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polynurb
PostPosted: Thu Apr 05, 2012 11:48 pm 
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Joined: Fri Mar 30, 2007 12:22 am
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Location: Giedi Prime
if you have the time try without/replace the ies emitter.

just a guess..

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Bubbaloo
PostPosted: Thu Apr 05, 2012 11:53 pm 
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It only happens in rare cases, not every merged render. Maybe polynurb is right about the IES.

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Brian Looney
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Mihai
PostPosted: Fri Apr 06, 2012 3:52 pm 
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Joined: Wed Jan 26, 2005 8:30 pm
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Location: Uzbjeckiazutjenikitzistan
Is this with 2.6.10 running on all the nodes?

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le13emepanda
PostPosted: Fri Apr 06, 2012 4:23 pm 

Joined: Mon Sep 12, 2011 12:42 pm
Posts: 20
Mihai, no we are still using 2.6.0.0, but all the nodes have the same configuration.
we are planning to update next week.

To Brian and polynurb, i'll try a test without any ies this week-end.

A+
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Bubbaloo
PostPosted: Fri Apr 06, 2012 4:33 pm 
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le13emepanda wrote:
Mihai, no we are still using 2.6.0.0, but all the nodes have the same configuration.
we are planning to update next week.

To Brian and polynurb, i'll try a test without any ies this week-end.

A+


Ahhh, it was a problem with 2.6!

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Brian Looney
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le13emepanda
PostPosted: Fri Apr 06, 2012 4:43 pm 

Joined: Mon Sep 12, 2011 12:42 pm
Posts: 20
Ok that sounds good news so !!!
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Fernando Tella
PostPosted: Sun Apr 08, 2012 9:42 am 
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Joined: Wed Apr 13, 2005 4:58 pm
Posts: 3014
Location: Madrid
Hmmm... I'm experiencing the same problem in 2.6.10 right now. Using Physical sky, mxi emitters, multilight on, around the same SLs. The merged preview shows nasty white dots while the mxi from one node doesn't and looks cleaner. :(
I'll try a manual merge and see how it looks.

Edit: Well, manual merge looks the same.

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le13emepanda
PostPosted: Sun Apr 08, 2012 2:29 pm 

Joined: Mon Sep 12, 2011 12:42 pm
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Hum That sounds bad news so :?
Well, when i worked with mentalray or vray for animations with hdri I have to blur it a lot to have stability on lightning through time and avoid flickering. Maybe it's a option with maxwell too concerning multi merging process. i can't test it this we...ouin !.. I have to find my eastern eggs first :D
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Fernando Tella
PostPosted: Mon Apr 09, 2012 6:56 pm 
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Location: Madrid
I think it started to happen when I introduced a frosted glass in the scene.

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le13emepanda
PostPosted: Mon Apr 09, 2012 7:29 pm 

Joined: Mon Sep 12, 2011 12:42 pm
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no frosted glass in my scene, but real glass instead of AGS I must to admit.
But there's no problem with one node so noise is not a problem in this scene.
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le13emepanda
PostPosted: Tue Apr 10, 2012 8:05 pm 

Joined: Mon Sep 12, 2011 12:42 pm
Posts: 20
I have tried without any IES...
Doesn't seem to work better...

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