About noise in general

[lukx]

OK I've found what was causing the problem !!! I was using just dome light with HDRI map in it no other light source. Bumping up subdivs to 256 solved problem

[PIXELBOX_SRO]

right but what if you want to use HDRI only to light the scene???
would you clear the noise by upping the dome light subdivs???

[lukx]

yes I edited my post bumping subdivs works

[PIXELBOX_SRO]

will have a proper read of this thread and try it on my scene to see how it works

[lukx]

aftr more tests with bumping only dome lighte subs the glossy nois is still a bit problematic... only some direct light source (sun) is solving the problem. Even vray light planes in windows aren't too good

[BBB3]

Ok, I thought you were using it in the environment slot.
Still, that doesn't explain the strange fact that DMC at 1/32 produces more noise than 1/12, which is also something I witnessed in my scene.

[BBB3]

What's the RGB colour of your wall?
Also, if you are not using LWF, you may run into this kind of problem when using too powerful a light source (which one tends to have to do in a non-LWF setup in order to let enough light into the room).

[lukx]

AH !! No direct light didn't help... I have it in overshot mode and then it removed noise but when overshot is off , glossy noise is still on

[lukx]

What's the RGB colour of your wall?
Also, if you are not using LWF, you may run into this kind of problem when using too powerful a light source (which one tends to have to do in a non-LWF setup in order to let enough light into the room).

I am using LWF . RGB of the wall is 0, 0, 250

[peterguthrie]

rendering some tests now, 1.5 vs 2, but methinks theres only one man who can clear this up, where is he??

[lukx]

I tried everything, there's now way to remove glossy noise without rising DMC subdivs (raising subdivs of glossy in material doesn't do ANYTHING)

[PIXELBOX_SRO]

this thread is long enough...i think it should attract his attention sooner or later
still waiting for my image to finish on IM/LC, after that ill run the BF/LC for comparison

[lukx]

the best I did (still tiny noise on wall):
res 600x300 on my ancient Q6600 (2.4GHz) - 15 minutes for this rectangular selection. I have no idea if it can be done faster.

and settings:

[pixela]

Yes this problem is similar to me.
I had to increase material reflection subdivisions to 100 to get decent results.
Only very very high AA settings get noise free. Increasing BF and material subdivisions make very long render times.

[BBB3]

Not quite the same problem, it seems. Luk is actually getting more noise when he raises the AA settings. Like I was.