bright dots

tornello · Post by **tornello** » Mon Dec 22, 2014 3:46 am

Hi, I have recently installed this version: Indigo Renderer v3.8.23, OS X 64-bit build
and now when I render
1) there are many bright dots that increase with time

(see image at 10000 samples/pixel)
2) if I use cpu rendering the image is dark and always with bright dots

Can you help me?

CTZn · Post by **CTZn** » Mon Dec 22, 2014 4:05 am

the bright dots are resulting from rare light paths that build up into varied caustics effects with time, but not always at a satisfactory rate; this is very much scene dependent. Super sampling is used in order to reduce their impact on the image. I like odd values personally, 3 or 5 generally.

tornello · Post by **tornello** » Mon Dec 22, 2014 4:07 am

Hello,
I have used super sampling = 5

CTZn wrote:the bright dots are resulting from rare light paths that build up into varied caustics effects with time, but not always at a satisfactory rate; this is very much scene dependent. Super sampling is used in order to reduce their impact on the image. I like odd values personally, 3 or 5 generally.

CTZn · Post by **CTZn** » Mon Dec 22, 2014 4:59 am

I would pehaps tend to use MLT that explores samples into clusters of points where single Path tracing would leave one, that's at this time a CPU only mode.

Get yourself used with the different tonemapping techniques, specially skip the Reinhard one if you feel that it is presenting a funny behaviour. Another factor that can enhance dots is too strong of a bump, and too bright or saturated colour. White shouldn't be above 85%.

tornello · Post by **tornello** » Mon Dec 22, 2014 5:23 am

Thanks for you answers.
I think that it was more simple and natural with the other version when using default settings all was easy:
now suddenly all difficult.

CTZn wrote:I would pehaps tend to use MLT that explores samples into clusters of points where single Path tracing would leave one, that's at this time a CPU only mode.

Get yourself used with the different tonemapping techniques, specially skip the Reinhard one if you feel that it is presenting a funny behaviour. Another factor that can enhance dots is too strong of a bump, and too bright or saturated colour. White shouldn't be above 85%.

Post by **Oscar J** » Mon Dec 22, 2014 6:53 am

If this is a new issue in Indigo 3.8.23, it's probably a bug.

tornello · Post by **tornello** » Mon Dec 22, 2014 6:55 am

so what can I install meanwhile?

Oscar J wrote:If this is a new issue in Indigo 3.8.23, it's probably a bug.

tornello · Post by **tornello** » Tue Dec 23, 2014 1:40 am

Oscar J wrote:If this is a new issue in Indigo 3.8.23, it's probably a bug.

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