Another DR Render problem

[pixela]

The problem is :

DR renders buckets with slight lighting differences. Not just maps, only colors too.
All machines have 3dsmax 2016 with the latest Vray version installed.

-Checked the gamma settings on all nodes
- Checked the maps on all nodes
- Checked IES files on all nodes
All is fine.

The render nodes are
Intel Xeon E5-2699 v3 @ 2.30ghz 36 core hyperthreaded to 72.64GB of Ram

So anybody can help me?

[tashko.zashev]

Hi,
More things to check out:
*) Make sure that the Windows regional settings "Additional settings" "Decimal symbol" and "Digit grouping symbol" have same setup for all machines.
*) Different V-Ray versions installed on the machines could also lead to such issues

Are you able to reproduce it even with a very basic scene setup (no maps) ?
Is it possible to share some images ?

[pixela]

Hi,

Sorry for the late reply. I missed the message. We are still having the problem. I checked all the regional settings and they are exactly the same.
Tomorow I will try to reproduce in a scene without maps.

Thanks once again.

[svetlozar.draganov]

Can you attach an same image so we could see how exactly the buckets looks like?
Have you also checked whether all render nodes have absolutely the same V-Ray version installed?

If there are maps in the scene imported via 3DSMax Bitmap node please update them to use V-Ray HDRI node via the following tool:
http://docs.chaosgroup.com/display/V...yHDRIconverter

There is a bug with Bitmap node which sometimes force Max to load textures with wrong gamma value.

[Pixelab]

I have the same issue. Strangely, the IR was different from node to node, but the result was the same (was it only a display issue of the IR?)

I checked / UNC / VRay versions / all bitmap inside VRayHDRIs / Regional settings... all correct but still the brightness difference.

[Oleg_Budeanu]

Try to uncheck "transfer missing assets" in distributed rendering options.

[tashko.zashev]

I have the same issue. Strangely, the IR was different from node to node, but the result was the same (was it only a display issue of the IR?)

I checked / UNC / VRay versions / all bitmap inside VRayHDRIs / Regional settings... all correct but still the brightness difference.

We have to change the compression method for the IR map DR preview in order to avoid such issues. I assume that the final image is being rendered fine ?

[Pixelab]

We have to change the compression method for the IR map DR preview in order to avoid such issues. I assume that the final image is being rendered fine ?

Looks like it renders fine. I'm not 100% sure but I don't see splotches on flat surfaces where the buckets were really contrasted.

[Oleg_Budeanu]

Ah if that is only on preview of irr map than it will render fine , we have it constant here. Was quite surprised with that for the first time , but since final is ok , than looks like it is just preview buckets got from DR nodes are different.

[danio]

One other thing you could try is turning of Probabilistic Lights...I've had nodes render buckets differently with that checkbox enabled.

[thomes]

when i saw this here and there, i also never thought that the final rendering is affected.
as i read this here i did a small test and i think the final render surely is affected, but it quite gets blurred and we can´t really see it easily.

you can measure the difference in the final rendering ! and i would also say you can even see it a bit.

with "transfer missing assets" it went away.

[tashko.zashev]

we also have this here since some time. i also never thought that the final rendering is affected.
as i read this here i did a small test and i think the final render surely is affected, but it quite gets blurred and we can´t really see it easily.

you can measure the difference in the final rendering ! and i would also say you can even see it a bit.

with "transfer missing assets" it went away.

It looks like one or more render nodes have missing texture/s. That's the reason why Transfer missing maps helps in this case.

[Oleg_Budeanu]

Yeah i can confirm that difference of IRRmap buckets in preview window does not affect final render (of course if you do not have any missing textures)