[Bf-cycles] Complex lighting situations issues_light intensity decreases > number lights increases

Jens Verwiebe info at jensverwiebe.de
Sun Feb 12 14:09:08 CET 2017

I experienced a similar issue in certain situations, where playing with 
MIS on/off helped to workaround this.

Please file a bugreport.


Am 12.02.2017 um 10:57 schrieb Guido Medici:
> Hi everyone,
> first of all I’d like to thank you for all the effort you put to 
> constantly develop and improve Blender and Cycles.
> Unfortunately, I’ve stumbled upon an issue that limits the usage of 
> Cycles in complex lighting situations.
> I’ve tried to look for a solution on several different forums, but all 
> my attempts were unsuccessful so I’ve decided to write to you directly.
> I’ll try to explain the issue as best as possible, In this link:
> http://blender.stackexchange.com/questions/73507/complex-lighting-situations-issues-light-intensity-decreases-number-lights-inc 
> you'll can find some pictures that better explain the problem.
> I have noticed that the more “lights” are introduced in a scene (both 
> interior and exterior) the more the intensity of each lamp is reduced.
> I’ve notices the same issue with HDRI images. Again, adding more 
> sources of light into the scene, results in a decreased intensity of 
> the HDRI image itself.
> Clearly, the problem becomes extremely limiting especially in 
> situations where multiple sources of illumination are required.
> In the attachments I’m showing the aforementioned issue, as you can 
> see the source of lighting (in this case a simple Point lamp) 
> decreases its intensity as the number lights increases. On every 
> picture I’m adding one or more lamps.
> best regards,
> *Guido Medici*
> *.......................................*
> Via Nino Cattozzo, 50, 45011 Adria (Ro)
> guido.medici89 at gmail.com <mailto:guido.medici89 at gmail.com>
> http://www.behance.net/Guido_Medici
> P.I. 01488300292
> C.F. MDCGDU89A24H620U
> *.......................................*
> *
> *
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Jens Verwiebe
Allerskehre 44 - 22309 Hamburg

Tel.: +49 40 68 78 50
mobile: +49 172 400 49 07
mailto: info at jensverwiebe.de
web: http://www.jensverwiebe.de

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