artefacts

[simsen]

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

[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.

[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

[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

[face_off]

Only set caustic_blur to 1 if all else is failing - since it will blur the noise a little.