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artefacts

Posted: Wed Oct 15, 2014 9:19 am
by simsen
TEST.png
hello,
I used an HDRI for the image attached, Path tracing and 16000 samples. I also tryied PMC but I had the same result
any idea?

thanks

Re: artefacts

Posted: Wed Oct 15, 2014 9:58 am
by PolderAnimation
Try to push the sampling rate of your texture emission node of the headlights (its default on 1 to push it up).
(I assume you have used the emission node for the head lights?)
Maybe that will help.

Re: artefacts

Posted: Wed Oct 15, 2014 10:09 am
by face_off
Nice render. I suspect the geometry of the headlights may not be ideal as an emitter. Use low-poly surfaces as emitters if possible, and using IES lights will help too. Also, make sure you don't have a surface over the light emitter (ie. the emitter should be the light glass - rather than behind a specular material surface).

In your case, you may well be able to set caustic_blur to 1 to fix it.

Paul

Re: artefacts

Posted: Wed Oct 15, 2014 12:02 pm
by simsen
thank you guys,
i pushed up samples, changed the glass to an emitter, set the caustic blur to 1 and now everything works fine

Re: artefacts

Posted: Thu Oct 16, 2014 1:54 am
by face_off
Only set caustic_blur to 1 if all else is failing - since it will blur the noise a little.