render quality problems

[ingoerik]

Hi all, i have a problem with interior lighting as you can see. I have used the worst picture and sharpened it so its easier to see, it gets better with higher quality settings (lowering the threshold in the adaptive sampler) but never goes away. Lighting is a dome light with a hdri and 4 spots and one point light with default settings; wall and ceiling are matte white without any image map; rendered with IC and LC.

Can someone enlighten me what went wrong, do i have to change some settings on the lights ?

[ingoerik]

Seems to be a problem with the hdri dome light, when i set the quality settings to the max 1000 subdivisions its nearly gone ... same to my nice rendertimes

And no, i am not a robot !

[vladimir.nedev]

There is a long thread discussing this : https://forums.chaosgroup.com/forum/...asing-geometry

Greetings,
Vladimir Nedev

[ingoerik]

Hmm, it has nothing to do with aa, it comes from the hdri dome light, when i switch that off its gone. Same on the ceiling, its clearly visible in the direct light render pass. With BruteForce instead of IC its still there, but its more invisible since its a noise pattern instead of that snowflake pattern. Its going mostly away by lowering the threshold in the adaptive sampler to 0,001 and make the domelight subdivs a bit higher.

So, thats with a threshold of 0,002 and light subdivs at default, but its still clearly visible, especially with the added contrast in post.

[ingoerik]

So, did a loooong overnight rendering (9 hours, the same renders 3 hours in Modo and is noise free) with IC/LC and threshold 0,001, but the noise is still visible. As said before the noise comes from the domelight, if someone as a useful tip for making noise free interior renderings in Vray i am all ears.