LuxRender Windows CVS build of 19-06-2010

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Re: LuxRender Windows CVS build of 19-06-2010

Postby Synthercat » Fri Jun 25, 2010 8:15 am

jeanphi wrote:Oh my! No wonder why you get fireflies! Your lamp body material is using a mattetranslucent material with both reflexion and transmission pure white. If the sum of reflection and tansmission is above 1, the material starts producing energy by itself when it receives light, and here you're using it in a context where it's going to receive lots of light.
Also note that some of your materials have rather high specular values (like the wall paint) and the glass of the windows isn't marked as being architectural.

If you fix those points, I thin kyou'll find that your scene will converge much better.

Jeanphi


1) errr it is 1-1 pure white! should I had made it into something like 0.9-0.9? or 0.1-0.9?
2) wall paint has no spec cause it's matte... only the shefes part has a small amount (50) to simulate a bit glossy paint
3) Why should I have made the glass arch? Wouldn't this make it have less reflection? I though Arch if only for lots of glass mostrly exterior to make things faster?

And in the end :
a) Thank you for the notes!
b) Still... as I said with this "faulty" scene the 0.7rc3 did not produce fireflies where this lates build does
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Re: LuxRender Windows CVS build of 19-06-2010

Postby jeanphi » Fri Jun 25, 2010 12:00 pm

Hi,

For mattetranslucent, the sum of reflection and transmission must be less than 1 for all components in order to ensure energy conservation. If you use pure white for one then the other must be black, if you use a 50% grey for one then the other must be at most a 50% grey, ... so more 0.1-0.9.
Maybe I've looked at the wrong material but it seemed to me that the wall material had a specular color of a 25% grey, this is a lot (nearly metallic).
As for the architectural glass, it doesn't reduce the reflections, it just prevent the light rays from bending and also prevents glass internal reflections (but the overall reflection should be equivalent), it will allow direct lighting to happen through the windows.
And maybe it wasn't nloisy in previous releases because it had bugs? This can happen sometimes... But I really don't know why there's this difference.

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Re: LuxRender Windows CVS build of 19-06-2010

Postby Synthercat » Tue Jun 29, 2010 10:36 am

I've also find little differences between these 2 version in glare but I guess that's known :)
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Re: LuxRender Windows CVS build of 19-06-2010

Postby Synthercat » Wed Jun 30, 2010 4:12 am

Just render anything with blender_voronoi on a channel... you get this warning
Parameter 'minkovsky_exp' not used
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Re: LuxRender Windows CVS build of 19-06-2010

Postby SATtva » Wed Jun 30, 2010 10:19 am

I'm wondering does it was removed or renamed? I need a clarification from jeanphi to fix the exporter.
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Re: LuxRender Windows CVS build of 19-06-2010

Postby jeanphi » Wed Jun 30, 2010 10:38 am

Hi,

It's just a typo in LuxRender, it was spelled with a w instead of a v, I've pushed a fix.

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Re: LuxRender Windows CVS build of 19-06-2010

Postby heretic » Thu Jul 01, 2010 3:39 pm

motion blur looks good in post rc3
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Re: LuxRender Windows CVS build of 19-06-2010

Postby jeanphi » Thu Jul 01, 2010 6:32 pm

heretic wrote:motion blur looks good in post rc3

Some fixes went in just before RC3.

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Re: LuxRender Windows CVS build of 19-06-2010

Postby heretic » Fri Jul 02, 2010 1:27 am

jeanphi wrote:
heretic wrote:motion blur looks good in post rc3

Some fixes went in just before RC3.


I recall you asking for tests of it but without answer - so I tested it (since I needed it ;) ) with varying speeds from 36 - 360 km/h in varying directions.


Results are good :) just your test result.
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Re: LuxRender Windows CVS build of 19-06-2010

Postby Synthercat » Fri Jul 02, 2010 11:39 am

After some pause / save film / quit /restart / resume

I found out this weird thing
Lux seems to get paused after some minutes... it happened about 3 times today (I've run it more than 20 times today though) I had to press the play button to resume it
Also just seconds ago I saw that current s/s was 0! Then it got to 5000 and a few seconds later it became 20000 (normal). There weren't anything else running here
besides opera. Opera could not such that many resources out of my 2600Mhz Althon Phenom (4 cpu)

also my PC is a bit... off! So I hope not to raise an alarm that could be caused by my PC
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