[Bf-cycles] Cucles rendering speed difference between preview viewport and final rendering

[Le Jardin Digital]

Hi

 i couldn't resist and looked at the command line rendering, which has 
many advantages to make rendering multiple scene during the night

It works but there is some problems:

* at first, i've to delete the 2.61 prefs file to make it work (i use 
*the MAYA prefs *and this makes blender-command-line scratch --> with 
the original blender prefs, it works, please resolve this issue because 
it's important to keep working with maya prefs... : i join attached a 
sreen capture of the bug )


* when launching the rendering process with the command line below :
blender -b file.blend -o R:/"test de rendu3" -F PNG -x 1 -s 001 -e 050 -a
it works BUT _*THE RENDERING SPEED IS THE SAME AS THE CTRL-F12*_ key and 
so *it's not as fast as the preview window* ( 5x slower ): i attache the 
scene  to this mail.
Is there any option to add to the command line to make it render faster 
? ( perhaps to select the CUDA mode ?... )

Another strange thing is:
it renders at 30 samples with the command line but the file is recorded 
with 50samples...

Thank you per advance for your enlightement .... :)

 


Le Jardin Digital - *Vincent PARIS* - 1123 route de Girounet - *24230 
Saint Antoine de Breuilh
*/Site internet:/ *http://www.lejardindigital.fr** ****     */Tél.:/*  
06-128-136-19  */Studio: /* 05-53-57-73-69*

 



Le Jardin Digital a écrit :
>
> Ok thanks a lot for the explanation !
>
> Hope the 100% GPU rendering (multi-GPU ?) will come soon !
> the command line rendering is not my speciality :) and i prefer to wait...
>
> Vincent
>
>  
>
>
> Le Jardin Digital - *Vincent PARIS* - 1123 route de Girounet - *24230 
> Saint Antoine de Breuilh
> */Site internet:/ *http://www.lejardindigital.fr** ****     */Tél.:/*  
> 06-128-136-19  */Studio: /* 05-53-57-73-69*
>
>  
>
>
>
> Brecht Van Lommel a écrit :
>> For rendering fairly simple images there's a CPU bottleneck with F12
>> rendering, for viewport everything stays on the GPU. It will be
>> addressed in one of the following weeks, it needs some bigger changes.
>> Background render from the command line does not suffer from the issue
>> as far as I know, that's the only work around I can suggest now.
>>
>> Brecht
>>
>> On Fri, Dec 30, 2011 at 1:05 PM, Le Jardin Digital
>> <contact at lejardindigital.fr> wrote:
>>   
>>> Hi
>>>
>>> can someone explain me this:
>>>
>>> cycles (CUDA) render much much FASTER (x5 ) on preview viewport compared
>>> to the final rendering viewport ( with of course the same window size
>>> preview/rendering and the same level of samples for preview and render).
>>> What is the explantion beacause i don't notice quality differences...
>>> It happens on all of my computers ( CUDA + win 64 + GTX470 + nvidia
>>> drivers 285.62), with every blender version (2.60, 2.61...)
>>>
>>> Is it a way to make the final outpout as fast as the preview one ? it
>>> would be great !!
>>>
>>> Thank you per advance for your responses.
>>>
>>>
>>>
>>> *
>>> *
>>>
>>>
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> Bf-cycles mailing list
>>> Bf-cycles at blender.org
>>> http://lists.blender.org/mailman/listinfo/bf-cycles
>>>     
>> _______________________________________________
>> Bf-cycles mailing list
>> Bf-cycles at blender.org
>> http://lists.blender.org/mailman/listinfo/bf-cycles
>>
>>   
>
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