Strange dark grain

[charlieinolas]

Guys,

 

I'm having a problem with this strange, black grain all over my scene.

I've done lots of renders in vray 3.0, settings here are standard (noise 0.01, irradiance + light cache), so there must be sthg that causes it (not vray settings).

 

Do You have any idea what that is?

 

[salvador]

I think the lamp intensity is causing the black dots. Try a blurry AA filter like Area and / or turn on Sub-pixel Mapping and Color Clamping.

 

Hope it helps.

[charlieinolas]

yep, this happens because of lights..thanks Salvador.

Bulbs have vraylight material on them, and if I switch it off, grain is gone. But when I want to create a sphere light (omni) and I put it inside the lamp instead of the bulb, the same thing happens. And they're not strong (2,5 multiplier). I tried to remove the surrounding glass but still no luck, black dots are everywhere... There's sthg strange here.

Edited April 12, 2014 by charlieinolas

[salvador]

Try the tweaks I suggested. I've got rid of stuff like that this way.

[charlieinolas]

Thanks Salvador, that worked.

However I've used vray for very long, and never got such black dots using fixed sampler set to 1 (I use this one for previews).

Anyway thanks, cause these dots are gone after changing to Adaptive.

 

p.s. What's strange - I just transfered this scene back to max 2012 and vray 2.4 (now have 2014 and vray 3) and the dots are gone using same settings...that means that there is a bug in vray 3.03 and that would confirm my suprise in this matter.

[salvador]

Ahhh ! that. Yes, I've seen strange things happen when opening an older version in a newer one.

 

Glad it helped.