Noise in the reflection table: bug?

[maru]

More PTS, less MSI.

You can try selecting a small square on the noisy area and letting it render for the same amount of passes that you got after 9 hours. Try changing lights samples multiplier.

You could also show HD cache settings.

[Polymax]

You can post part of scene (with noise and fireflies)? I would tried to help.

[cecofuli]

PTS = 4 for DOF, as Ondra suggested me.  MSI = 50 for better highlight.
HD as default. Never change.  I'll rty with crop and see what happen.

Yes, I have the scene both in VRay and Corona.
I want to clean-up and post here both files.
With VRay and sub-pixel mapping OFF was impossible to render in decent time.
When buckets are  over transparent chairs, DMC sampler becomes CRAZY!!!
This is a "big problem" in VRay, as Vlado wrote me. 
Look my old VRay thread  LINK

If you want to compare VRay and Corona (or MW, Arion, Octane) sub-pixel mapping must be OFF.

IOR for chairs is wrong. And I don't like the shader/color. But this idea is from my architect :(
S curve, CC , Sharp and denoise in PS

[maru]

HD as default. Never change.

Maybe you should try with different settings. You can always revert to original values with right click.

[cecofuli]

good, but I don't know how HD parameters influence the noise XD

[cecofuli]

With the  new daily build, something different in the chairs reflection.
I change a little bit the power of lights, but not the IOR...
I don't like the "back table reflections" inside  the chairs... =(
 
PS: no fireflies ;-)

[Ondra]

yes, it behaves differently, I'll look into it today or tomorrow

[cecofuli]

Ok. Thanks! And... do you have some suggestion for the noise in the black area?

[Ondra]

no... either give it more time or wait for the adaptivity ;)

[cecofuli]

Here the scene just for testing purpose.

As you can see, after one hour, for this resolution, is enough and with double time we don't have significant improvement in the noise quality. (PT+HD)

[cecofuli]

But I don't understand the differences between PT-HD (lighter) and PT+PT (darker)

[cecofuli]

Here a render at 3000px after 9 hours!!!
Good quality after 3 hours, but the noise, created by lights on the reflective surface, is still here =(
Ondra needs to works on this "bug-problem".
 
PTS = 6
MSI =  20
Lights samples = 4

[Polymax]

try set refl.gloss to 0.99 or (0.999) for clear refl, in the alpha 3 it's help me.

[cecofuli]

thanks for the suggestion. I'll try ;-)

[cecofuli]

Polymax, I didn't solved the problem with glossy at 0.99.

sole sligtlhi better result with Lights subdivs, but... I thing we have to wait Ondra and new Corona render.
Too much noise in the reflection lights, after... 18 hours!!!  (Final output 3K)