V-Ray 3.6 VFB hangs

[KiboOst]

Here is a problem I have some difficulties to identify.

When using V-Ray VFB, while rendering, if we touch some settings like white balance, max hangs, change active windows with each it can find (render setting, main ui, vfb etc) and no change can be seen. I doesn't crash but can tak minutes to come back responsive.
Sometimes, even zooming in vfb with mouse wheel cause white vfb and takes age to come back, if it does. Same on some render slaves via BB, the rendering finish fine but the vfb stay white.

Also, sometimes cancelling the render also do such windows activate everything/white vfb and takes minutes to come back responsive.

This doesn't seems to happens with max vfb.

Working on heavy scene, millions polys/thousands objects
Windows 7 Pro x64 SP1+performance update
nVidia 1070
3dsmax 2018.2
V-Ray 3.60.02 (3.60.03 in deployment, let's see tomorrow)
RailClone Pro, Forest Pro, PhoenixFD up to date

If someone has idea where to look at to identify from where it could come ...

[Pixelcon]

I should add, I had a massive scene that after rendering finished (11 hour render) froze for hours and I eventually had to give up on it. Also using 3.6.

[vlado]

I have not had this happen before; it might be specific to 3ds Max 2018. How easy is it to reproduce it? Does it happen every time? What if you turn on the "low thread priority" option?

Best regards,
Vlado

[KiboOst]

It happens a lot but not everytime, which is hard to identify.
low thread priority is checked on all our machines (it is in a startup script, with max priority low)

I have check setting max process affinity to cores number -1, it does the same

V-Ray 3.60.03 doesn't solved it

[tryharder]

same problem over here

... VRay 3.6.03 and Max 2018 sp2 ... win 10 latest updates ... dual proc

create a plane, put a sphere on it, create a dome light
open vray VFB, hit start interactive rendering ... vfb shows a strange preview ... but is not updating at all
vfb is frozen ... have to quit max by task manager

if i do exactly the same in 2017 it works as expected

in 2018 i had tried the latest nightly when i run into that problem
i deinstalled all vray inst. for all max versions and after that installed new ones for max 2017 and max 2018

2017 works ... 2018 does not work

strange

[KiboOst]

Here, it is using bucket model.

Seems max2018+vray3.6 ...

[tryharder]

i just tested on an other older machine

max 2018 but not updated to sp2 ... 20.0.0.966
Vray 3.57.01 from 19.04.2017

that combination works !!!

on my workstation with max 2018 sp2 ... 20.1.0.1452
i stepped back to VRay 3.57.01 from 31.05.2017
does not work !!!

so it seems that the updated version of max is causing the problem ... or the combination

[Svetlozar Draganov]

I can't replicate that on my test scenes.
Does it only happen with multi-million polygons scenes? Can you try to replicate it on a very simple scene with a few basic primitives without any premade data?
If it doesn't happen on the elementary scenes would it be possible to send us a scene that replicates the issue and some guides what we have to do in order to trigger the issue?

[tryharder]

just one more information

i also have the latest version of corona installed

should not be a problem

but who knows ...

[tryharder]

I can't replicate that on my test scenes.
Does it only happen with multi-million polygons scenes? Can you try to replicate it on a very simple scene with a few basic primitives without any premade data?
If it doesn't happen on the elementary scenes would it be possible to send us a scene that replicates the issue and some guides what we have to do in order to trigger the issue?

please read my post ... a plane ... a sphere ... a domelight

[KiboOst]

just one more information

i also have the latest version of corona installed

should not be a problem

but who knows ...

No Corona here.

[tryharder]

so it smells like max 2018 latest update

[vlado]

so it smells like max 2018 latest update

Ok, will check it out.

Best regards,
Vlado

[KiboOst]

Thanks Vlado, it's really annoying in day to day productions.
Let us know if we can provide/test anything to help

[Pixelcon]

Mmmm happened to me with 2016