High-res noise artefacts

[Yadla]

Hi, i'm experiencing higher resolution rendering,
and i discovered some strange noise effects on my walls.

Settings are standard, and even when leveling up GI min rate/max rate,
i can't get rid of this noise...
Noise which i don't see on small res rendering.

I played with interp samples and hsph subd,clr thresold or nrm etc...
the difference is very poor for much more rendering time.

Do someone know how i can avoid this ?
Is the only solution using higher GI min/max rate values ??

This problem happens mainly (if not only) with skylight penetration.

here are the examples:





Thanks helping me!

[GoncaloP]

you cant get a good and rich illumination with Vray with only skylight for interior scenes, thats why there is the option for skylight portals, you should try it.

Gonçalo

[Yadla]

Yep i tried skylight portal, and i have no problem with any kind of arealight setup.

But if i want good result with skylight only, isn't that possible ?
Don't matter why, it's up to me

PS: the shots i show are details of render with both sky and directionnal/area lights, the noise problem appear in the zones where skylight influence is predominant.

[GoncaloP]

You should try photon map too

Gonçalo

[Yadla]

good point


but... does that mean that smooth indoor walls with skylight is impossible without huge render times ?

[GoncaloP]

Yes, I think so...

Gonçalo

[GoncaloP]

You can allways try to use a very high multiplier for the skylight, but usualy Vray becames slow when we force to much the multipliers...

Gonçalo